Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa12e3d88f0d4f6f…

MALICIOUS

PDF

40.1 KB Created: 2020-08-11 17:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae05d43bcb9efac4b08a28c3fb538f2 SHA-1: e4455e0a6b67f08f0d0afa22aac5a79af9954880 SHA-256: aa12e3d88f0d4f6fe48221adb7da381aed438963f79045bbe0f5f09a1681365c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary URL, https://ttraff.ru/pify?keyword=causes+of+cervical+cancer+pdf, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, limiting the analysis of direct payload 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=causes+of+cervical+cancer+pdf
    • http://files.pelicancovesc.com/uploads/1/3/0/7/130775049/naguterodujuv.pdf
    • http://filarapot.publicgypsum.com/uploads/1/3/1/6/131606289/vorarurilodadubobibe.pdf
    • http://files.gofish-lures.com/uploads/1/3/0/8/130873997/4632486.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/35411068823.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3950/files/windows_10_battery_icon_greyed_out.pdf
    • https://cdn.shopify.com/s/files/1/0433/0746/6916/files/nifaxapopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8791/files/biodata_format_for_marriage_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/ximunasus.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/mawavuvovimigolawisegesi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/zixidezajavimibigunon.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0673/files/bulthaup_b1_preisliste.pdf
    • https://cdn.shopify.com/s/files/1/0444/1748/2919/files/acls_study_guide_2015.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_off000060f6.bin
d164b87535e7b605f7084cb8ba54d4f0dff3281e7794c8725c48c4c095b3e6a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F6 5116 bytes
font_01_sfnt_off0000726f.bin
212eb54d8744b229303a7729d0052738b84e533cc46c21009d877a6df9943196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 9764 bytes

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