Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ac6eb95ea1501c…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 17:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a474bf4ffe442e16176789cc4f9894cd SHA-1: 2f01459d38cb7f2d64d0a3e0118862853439eb53 SHA-256: f6ac6eb95ea1501c1584e242f395b427ad30b30737047d90d8f446d09eaf963c
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=rrb+alp+answer+key+17+aug+2018'. Additionally, it features a large number of external PDF links, many hosted on Shopify domains, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' heuristic further supports a lure-based attack. The document body itself is heavily obfuscated but contains the malicious URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=rrb+alp+answer+key+17+aug+2018
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdf
    • http://files.nourishbodymindspirits.com/uploads/1/3/1/3/131380756/b48d83c76e97.pdf
    • http://files.turnsofphrase.com/uploads/1/3/1/6/131637240/2ca6e7.pdf
    • http://fopazif.titansinvite.com/uploads/1/3/0/7/130776255/ramiwuzaju_tirotuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/86831132799.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/24911504508.pdf
    • https://cdn.shopify.com/s/files/1/0428/6277/2380/files/guxufelesoxupif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/sivemivinubisopalede.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/vernacular_architecture_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/assisted_dips_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/27140268444.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/red_werewolf_hunter.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006138.bin
3410d52b35a9ce26f4d185ad39bf4e3742f34bd346c16f8fa341c1e5309d472e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 5992 bytes
font_01_sfnt_off000075cd.bin
fde001ecdb3d901df5de5e8474cdf70643f296921d1e67f4a88fdeb0436881c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 10240 bytes

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