Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3e0288c7081563…

MALICIOUS

PDF

33.4 KB Created: 2020-07-08 15:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 87cda4111df8634b0c0319b6e799ab47 SHA-1: 4da669282b73b9ccfec2270cff3b321f0775ab23 SHA-256: ff3e0288c70815636ed92d54fb82220fd853cc7d2de3a1c708eab0121aae594f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links redirects to a known malicious URL, suggesting a phishing or malware distribution attempt. The document body text and embedded links are designed to lure the user into downloading further content, likely malicious.

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=download%20integrated%20solid%20waste%20management%20tchobanoglous%20pdf In PDF document text
    • http://files.silverdappledesign.com/uploads/1/3/0/9/130969082/8685434.pdfIn PDF document text
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdfIn PDF document text
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdfIn PDF document text
    • http://files.ccgscavers.org/uploads/1/3/0/9/130968956/e76ba14886ba35.pdfIn PDF document text
    • http://files.allfloorsinteriors.com/uploads/1/3/0/9/130969375/kexajize.pdfIn PDF document text
    • http://files.icves2020.org/uploads/1/3/0/9/130969907/79b8ef29d98b3.pdfIn PDF document text
    • http://files.hallielee.com/uploads/1/3/2/8/132815961/5788720.pdfIn PDF document text
    • http://files.nakedfranktheatre.com/uploads/1/3/0/8/130874458/ec4288f3eb.pdfIn PDF document text
    • http://files.light-sup.com/uploads/1/3/2/6/132681002/lolonegesositub.pdfIn PDF document text
    • http://files.dsanorthstar.org/uploads/1/3/0/9/130969709/9026856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xeveralim.files.wordpress.com/2020/06/sidutonuzazunejo.pdfIn PDF document text
    • https://meboraxi.files.wordpress.com/2020/06/jexoxotakupifubenijazeg.pdfIn PDF document text
    • https://sotetusuveti.files.wordpress.com/2020/06/36927832214.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000448f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x448F 5684 bytes
SHA-256: 2715be4672bf6aef935486caa97b9ea23c66d8183ea07a9a6af0b812b256e444
font_01_sfnt_off000057c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C3 9584 bytes
SHA-256: da6dcadecc896f8be89832603f523c3d9dc30b30b06789a2db9ed1900045da98

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