Malicious PDF — malware analysis report

Static analysis result for SHA-256 1020538376102aba…

MALICIOUS

PDF

58.1 KB Created: 2020-07-30 19:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d31a892cbed6345aab31fde691aa742 SHA-1: b979471f820f28ef6f58c4f9fc04059f228bca42 SHA-256: 1020538376102aba9029d709b142043f28105eb5c31b7a1757a7fc55018f24e0
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a fake CAPTCHA lure to trick users into interacting with malicious links. It also hosts a large number of SEO-optimized PDF links, many of which point to potentially malicious redirector infrastructure like 'ttraff.cc'. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to distribute further malicious content or phishing pages.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=boarding+pass+sample+pdf
    • http://files.burbankbeat.net/uploads/1/3/2/6/132681901/riwiboj_gilomogapuj.pdf
    • http://files.acretsi.com/uploads/1/3/0/7/130739234/fizawi.pdf
    • http://files.cairowalkingtours.com/uploads/1/3/1/3/131397987/e085f863b5c3da6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1660/0227/files/dobosegekazogiketujiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/zuwikisapapedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/dokisivujikajo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rawese.pdf
    • https://cdn.shopify.com/s/files/1/0437/4616/4897/files/vajilowasusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/rajixalosatinovol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/68454573310.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/12845621807.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/37769531035.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/67577607465.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/29449529669.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/64078998208.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6d3.bin
08bd09f9cd355be37b7b33a77fdd788254ae0ecd5fb44e0f62c043d6e541d0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D3 5120 bytes
font_01_sfnt_off0000b815.bin
6315df285ee63d30a79f890e982eeca7e81bc83b05082c94413ebccdc651da3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB815 10284 bytes

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