Malicious PDF — malware analysis report

Static analysis result for SHA-256 011a51da0f48758f…

MALICIOUS

PDF

60.9 KB Created: 2020-07-09 20:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: a938182bbca36fef86ee122515029239 SHA-1: 68045f05a52a2dde708ca402f8dd3feb77408e1a SHA-256: 011a51da0f48758ffa367bab335a017921b1fed950cac3a26153d35fe755080a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, https://ttraff.cc/wb?keyword=how%20to%20resize%20pdf%20file%20in%20macbook, is flagged as a malicious redirector. The document body itself contains similar SEO-related keywords and the malicious redirector URL, indicating an attempt to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=how%20to%20resize%20pdf%20file%20in%20macbook In PDF document text
    • http://files.pamelarogalski.com/uploads/1/3/1/3/131398250/zugolinewiro.pdfIn PDF document text
    • http://files.wallingfordphoto.club/uploads/1/3/1/3/131379252/medatugoji-lewupewezilo.pdfIn PDF document text
    • http://files.mariettapilgrimage.com/uploads/1/3/0/7/130739120/livevofijebopaforaxo.pdfIn PDF document text
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdfIn PDF document text
    • http://files.draumalandslabs.com/uploads/1/3/1/6/131606482/8069493.pdfIn PDF document text
    • http://files.lessons-by-alex.com/uploads/1/3/2/7/132740692/gadaxopode.pdfIn PDF document text
    • http://files.toadsoftowedhaul.com/uploads/1/3/2/8/132815752/2564212.pdfIn PDF document text
    • http://files.ernst-arch.com/uploads/1/3/2/6/132695478/6256925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://zofexokizixo.files.wordpress.com/2020/06/6806575164.pdfIn PDF document text
    • https://korovite.files.wordpress.com/2020/06/dalexotata.pdfIn PDF document text
    • https://gibewebor.files.wordpress.com/2020/06/70448523389.pdfIn PDF document text
    • https://fivulenis.files.wordpress.com/2020/07/sijizak.pdfIn PDF document text
    • https://zopowozofoje.files.wordpress.com/2020/06/vudebijirebo.pdfIn PDF document text
    • https://zutomexarix.files.wordpress.com/2020/07/botizisunijolimumidosuje.pdfIn PDF document text
    • https://ludofinat.files.wordpress.com/2020/07/85776368429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 5396 bytes
SHA-256: d71bf38c922797e79ffc175f2adbc1f99057919d5e4408c40f077006d4a529b1
font_01_sfnt_off00007d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D94 13196 bytes
SHA-256: 4806191be12d7c1fd37210d8838376573ecc89c30c6157e06620955aad047c92
font_02_sfnt_off0000a242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA242 14524 bytes
SHA-256: 9b955e41fde9ae4ad79ff06c320e96b1dccd499450dd4bf2e727bd71822e1120
font_03_sfnt_off0000d098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 16116 bytes
SHA-256: f5e834e446a37b383cf0065db04bd7ae2a1fc034f9e6b9b3312d42a3fc9485cb

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