Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc05d68f316ea813…

MALICIOUS

PDF

50.8 KB Created: 2020-08-23 16:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 479a2ab0391d7c77a0988ad992fa4c29 SHA-1: 4466676a4e1f05f0803d92538e698ba87a574b9a SHA-256: fc05d68f316ea8139d6793c64a650f5bcfc8e5c0d1e1b79f673fac2cfd536287
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'ischemic stroke guidelines secondary prevention' and the redirector URL, indicating a lure to disguise malicious activity. No scripts were extracted from this sample.

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.cc/pify?keyword=ischemic+stroke+guidelines+secondary+prevention
    • http://files.kristinfialkotherapy.com/uploads/1/3/1/4/131455463/fusenexubu_fiwinefufuz.pdf
    • http://jotapi.corvinoperformance.com/uploads/1/3/1/3/131380397/gasevokim.pdf
    • http://files.scrapthetrappgh.org/uploads/1/3/2/6/132681317/lutuwuzuwegek.pdf
    • http://files.mecaholland.org/uploads/1/3/1/3/131398140/6531612.pdf
    • http://ravan.tonicameronphotography.com/uploads/1/3/1/4/131437261/beleb.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/jalanesoxilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/18269160515.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/the_octoroon_play.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2140/files/12_grain_bagel_tim_hortons_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/chief_keef_sosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/mobile_money_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0440/6578/3958/files/kayla_itsines_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/occupy_till_i_come_sermon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98572357872.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/cholesterol_structure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/6886345443.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/92623419382.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/61968876113.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780a.bin
c66955a67a872a7d8a93cbbc84d94b3e8d008782a30b34f4dfa50faf26e048fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 5532 bytes
font_01_sfnt_off00008ab8.bin
88e1564f0fc42dec37b45935fc69a2e0f454d5748c6d469a0e2b975a2bd31776
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB8 10844 bytes
font_02_sfnt_off0000af9c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9C 4324 bytes