Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a9e8ab55a36e72…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 15:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a6baca7556e1a1bfd72f02c7ad5e22 SHA-1: 38164725f297aafe33ed42cc9063d819769e915f SHA-256: 94a9e8ab55a36e72c04e808efc625482f30adeb2fceda87dc65e58da58a24863
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, a technique often used for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=article+spinner+apk'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, potentially for further exploitation or malware delivery.

Heuristics 3

  • 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.
  • 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=article+spinner+apk
    • http://files.rcmantaray.com/uploads/1/3/1/6/131607093/wivavadonoras_kuragukobaf.pdf
    • http://files.whealey3md.com/uploads/1/3/2/7/132740204/3550789.pdf
    • http://files.drorcatering.com/uploads/1/3/0/9/130969934/91e1ec2.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/6702738344.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/suxovotukefalenulitemokil.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/pufumubovaxojerakiwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/ximamozur.pdf
    • https://cdn.shopify.com/s/files/1/0453/3600/2715/files/nulebatul.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/55701572975.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/69843928273.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/wivabob.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/kefedowagujolaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/3480828440.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/87680036744.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_off00006660.bin
e4e5988ec8d7324b5610c10fb112ab4a8b493668ae5cbae02e40a3221b694758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 4980 bytes
font_01_sfnt_off0000775a.bin
1a5d32fab56d9d4e211da1c44401912bae182bc385bf038987fe2b894eee3a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 10936 bytes

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