Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76ed8839abdb37f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 13:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4868e13263b6a87c5c52f9b5b2f53ea9 SHA-1: db9ccc30f8a076a658842b73089786d4949f6a52 SHA-256: d76ed8839abdb37fd83e8271663a17bc71fe1b36198286aea42ea52fe9638a6f
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains, but crucially includes a link to the malicious redirector traff.cc. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack chain. The presence of numerous external PDF links suggests a tactic to increase search engine visibility for malicious content or to distribute malware through a link farm.

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=basic+application+of+computer+pdf
    • http://files.justneighborsvt.org/uploads/1/3/0/8/130874554/nalukinojosera.pdf
    • http://files.leapinlizardsdaycares.com/uploads/1/3/1/3/131383791/4b552d70.pdf
    • http://files.bamachutes.com/uploads/1/3/1/4/131453605/ledonon.pdf
    • http://files.berkeleyellis.org/uploads/1/3/1/4/131437312/toradume.pdf
    • http://files.gracecatcollective.com/uploads/1/3/1/4/131437605/b73f2e8d7c.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/sejarah_kemerdekaan_amerika_serikat.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/jerelatezavafuko.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/sweepstakes_audit_bureau.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/dumobugiwamuritenabaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/79288618312.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/jajasipagetaxopuniguxudib.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/29739996187.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/42873032618.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/kewipimom.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_off000067ff.bin
ee255b2042fa803f6c45a4ba6e81963f2729ee5c947bfed004c8b7ba85770552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FF 5348 bytes
font_01_sfnt_off00007a16.bin
6a64ee451270ddb83447539d0b8aa9977632caa90dc8281d716892f7b273dcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A16 10004 bytes

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