Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb07f23222a66a6…

MALICIOUS

PDF

45.9 KB Created: 2020-08-10 10:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7eb6355c50dd41eab07c0273aa1a88 SHA-1: 40c24c7441649be6e29aeecc8e6a2c6cce9fbb5f SHA-256: 1fb07f23222a66a64c51f3c257b3fbb2df80a6960ebbc41d64c44cd70dd6e46d
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure under the guise of providing a PDF document. The document body itself contains garbled text along with the malicious URL, further indicating a deceptive lure.

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=cetoprofeno+150+bula+pdf
    • http://files.lithoscounselingandconsulting.com/uploads/1/3/1/4/131453053/jegesejawidis.pdf
    • http://nosimame.nccsdclearinghouse.org/uploads/1/3/0/7/130775493/jefefugirirutemonot.pdf
    • http://rozudivuz.droneabove.com/uploads/1/3/2/7/132712109/8eb27b9a085f.pdf
    • http://files.cheltenhamconnect.co.uk/uploads/1/3/1/3/131383921/bidix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/wabimogavubabaxokom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/wowafubajiputew.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/small_business_management_course.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/wuzelif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/69026282854.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/nafexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/14811044303.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/51354987779.pdf
    • https://cdn.shopify.com/s/files/1/0428/0804/9830/files/dotigikijujezokuxogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/24816125003.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/9832573593.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/applied_social_psychology_theories.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/5082104507.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_off000075e8.bin
ba6f1e68c6eebd5506bab5b6b97bcbc1184a152e183f27caae54c8aa95325015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 5220 bytes
font_01_sfnt_off000087b5.bin
99ece54d73a612f9390503ea792369470800e39bc45563466df76d3c387935e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 10192 bytes

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