Malicious PDF — malware analysis report

Static analysis result for SHA-256 444f01b8e8facad5…

MALICIOUS

PDF

57.1 KB Created: 2020-08-04 22:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19cb309c801412ec7fc3b8891f5b1ede SHA-1: 3000052accdb4ee93d7ea599c66ad97ce0989449 SHA-256: 444f01b8e8facad550c5ed7b597d0636e65bd3b39a3d036e7d4d27233634abbf
128 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, a technique often used in SEO link farms to manipulate search results or distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=alpha+amylase+inhibition+assay+principle+pdf', is identified as a known malicious redirector. The presence of a visual download button further supports the lure aspect of this attack.

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=alpha+amylase+inhibition+assay+principle+pdf
    • http://files.breannpattyphotography.com/uploads/1/3/1/1/131164128/suzen-kewikobomon.pdf
    • http://files.momentsintheword.com/uploads/1/3/1/6/131607310/5769930.pdf
    • http://files.woodlandtechnology.org/uploads/1/3/1/4/131454383/67f20.pdf
    • http://files.vitalgateacupuncture.com/uploads/1/3/2/8/132814097/710a0763d546a.pdf
    • https://cdn.shopify.com/s/files/1/0430/3935/9127/files/vanubomovixogogeduvew.pdf
    • https://cdn.shopify.com/s/files/1/0440/6001/6790/files/a_first_course_in_probability_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6699/0498/files/navenemufufirofosesite.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/20689454625.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/xolopukulupiwugadisaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/zuwuvatud.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/kitobasovejiranovuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/sunelebifabedobodeseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/fovegugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/boss_gt_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/45705419463.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/98051373939.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/51924899638.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_off0000a049.bin
5d357c46a65d307fe320056f98c035dad2840a50fe07c28aa38bd9634b20a940
pdf-font-stream PDF embedded font (sfnt) at offset 0xA049 5628 bytes
font_01_sfnt_off0000b33f.bin
f9ea56e733b9f5594355bc31314d68fc4817cbcaa1a96b7c1d11819b175f8d03
pdf-font-stream PDF embedded font (sfnt) at offset 0xB33F 10544 bytes