Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61eaa88565487d9…

MALICIOUS

PDF

32.7 KB Created: 2020-07-10 04:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0172ade92699941659facc2f0ddaf113 SHA-1: 6f31d91ec51fff57100e36fa186e2a3c92f4387b SHA-256: e61eaa88565487d90092fe17c85e38c1a154518149905b6a133aeb60a9d52435
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed for SEO manipulation. One prominent URL, https://ttraff.ru/wb?keyword=nissan%20juke%20owners%20manual%202019%20uk, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the lure of a 'Nissan juke owners manual 2019 uk' to entice users to click through to malicious infrastructure.

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.ru/wb?keyword=nissan%20juke%20owners%20manual%202019%20uk In PDF document text
    • http://files.lochgoin.com/uploads/1/3/1/6/131607239/gutexal.pdfIn PDF document text
    • http://files.zerowastelady.com/uploads/1/3/1/6/131606550/jupenoleniforaxomoju.pdfIn PDF document text
    • http://files.admcclub.com/uploads/1/3/0/8/130813120/ed39dfa7f46a5b.pdfIn PDF document text
    • http://files.woodside1-2-3-4hoa.org/uploads/1/3/1/3/131383645/a6f466623.pdfIn PDF document text
    • http://files.d-aleksandar.com/uploads/1/3/0/8/130813546/gakujatufaxa.pdfIn PDF document text
    • http://files.nadeemkhan.net/uploads/1/3/0/7/130776027/lepap.pdfIn PDF document text
    • http://files.lwetherbee.net/uploads/1/3/1/3/131380001/9ba269340.pdfIn PDF document text
    • http://files.dslawnandlandscapes.com/uploads/1/3/1/6/131606854/juwawedasu.pdfIn PDF document text
    • http://files.drewbreder.com/uploads/1/3/0/7/130738507/9066bddd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://noguzuzoka.files.wordpress.com/2020/06/taremuge.pdfIn PDF document text
    • https://zitipon.files.wordpress.com/2020/06/26899404215.pdfIn PDF document text
    • https://rawekivop.files.wordpress.com/2020/07/talaxemetezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.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_off000043c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43C4 5316 bytes
SHA-256: ea0d1d4857ea507f877c84575222eef11a5d7d7dbc31cd59a59e6d8f9c125695
font_01_sfnt_off000055c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C5 9464 bytes
SHA-256: 4852499b4441816eefe0412e1338ee61f1a7fa74fb233d989e63924bcfbdeca6

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