Malicious PDF — malware analysis report

Static analysis result for SHA-256 b381a9e526559d88…

MALICIOUS

PDF

35.9 KB Created: 2020-08-14 14:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 846486100a3ef392d3cbae3fe43022cb SHA-1: fe5c6e3aa6454b5a7c317fa4dde0779d7e13f771 SHA-256: b381a9e526559d887580b7845b94cfdebf48a13fecbb20beacec15ac1b17cb81
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link disguised as a "Solidworks 2012 free trial" lure. This link redirects to a malicious domain, indicating a phishing or malware distribution attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to manipulate search engine results. No scripts were extracted, but the primary attack vector is the malicious redirector.

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.com/pify?keyword=solidworks+2012+free+trial
    • http://wedaxif.wheteach.org/uploads/1/3/0/8/130874104/xurawalojajerikiki.pdf
    • http://sabanugad.theshamandoctor.com/uploads/1/3/0/8/130815026/4594892.pdf
    • http://files.aunaturalqueen.com/uploads/1/3/1/4/131437091/fibumime.pdf
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/vutilusuzinikifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/jaditunaza.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/paporixofu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/42711872065.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/33923673809.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/76522028197.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/69232609593.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/kakawedofodiwapulek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8335/6565/files/margaret_hough_counselling_skills_and_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/60668995158.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/bezemu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/rojigikabafowonixavobaser.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_off00004e4c.bin
5f2a580981ff75e1f5d46f9ded1923840fb17519bcd2fa2415c40e2bdf6a95b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4C 5484 bytes
font_01_sfnt_off0000611a.bin
75aa2c1ed4c2a3d4b2f5704234a953a9755e9aed19760d739265c1c1415d5186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 9836 bytes

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