Malicious PDF — malware analysis report

Static analysis result for SHA-256 c650ad1c1656f0c2…

MALICIOUS

PDF

47.2 KB Created: 2020-07-19 05:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: ec2b996c92df94f69e6b79b237ab3a8d SHA-1: c0c6171517de1114550507451822d6879f411d38 SHA-256: c650ad1c1656f0c2563114892215182e09764ece079910d3d43534b9a3838a8d
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious sites, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Acura Canada warranty manual'. The presence of numerous external PDF links points towards a link farm strategy for distributing malicious content or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=acura%20canada%20warranty%20manual In PDF document text
    • http://files.medicalherbalistsussex.com/uploads/1/3/2/6/132682040/madumim_topegonedef.pdfIn PDF document text
    • http://files.mobilpapershredding.com/uploads/1/3/1/4/131407918/61b88.pdfIn PDF document text
    • http://files.caribbeandawn.com/uploads/1/3/1/3/131398334/fevomigilukupeb.pdfIn PDF document text
    • http://files.dafniantonarou.com/uploads/1/3/0/7/130740624/5b84b81.pdfIn PDF document text
    • http://files.chackbayfire.com/uploads/1/3/0/7/130775220/nituzukukebuxar.pdfIn PDF document text
    • http://files.marahgaiti.com/uploads/1/3/1/8/131872273/4252089.pdfIn PDF document text
    • http://files.thepoipuppy.com/uploads/1/3/0/7/130739601/7c1158dfb9bf443.pdfIn PDF document text
    • http://files.fishwoodworking.com/uploads/1/3/0/9/130969312/b7de32271d16.pdfIn PDF document text
    • http://files.decaturcountyworks.com/uploads/1/3/1/4/131453453/muxafukoteluwufo.pdfIn PDF document text
    • http://files.liberato.us/uploads/1/3/1/4/131412290/9a6944c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zizejabiwugu.files.wordpress.com/2020/07/dugesaguzogugeselixuwe.pdfIn PDF document text
    • https://gijatok.files.wordpress.com/2020/06/53073680113.pdfIn PDF document text
    • https://lofukidowoji.files.wordpress.com/2020/07/1473184629.pdfIn PDF document text
    • https://lugopago.files.wordpress.com/2020/06/niwenigepakup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/73310617751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/76068249426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/pigigajugewikafimenevan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/56382767942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/70160349598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/40968329124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/jafekisulozere.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_off00007b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 4696 bytes
SHA-256: 2787ba3fe446977bff318cd0afa560e3b9038373c056f657b7eea2a1c4a68782
font_01_sfnt_off00008b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B76 10564 bytes
SHA-256: 17d52a41068305a488352d93ef42be5d10642702524625de8f0e7ac39ac4ec02

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