Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a06346ca6cdf6cf…

MALICIOUS

PDF

47.4 KB Created: 2020-08-22 10:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80d5020cb998ea1a566c560deb9fe855 SHA-1: ece8d3e493e3f782f4012c4ab18675eed4388f54 SHA-256: 5a06346ca6cdf6cfa27e595c7b1b76585505c0233cb7bf4c4b4ff367be224f83
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=introduction+to+geometry+proofs+desmos+answers. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a malicious site. The presence of many links to Shopify PDFs, alongside the malicious redirector, indicates a link farm or SEO poisoning tactic to distribute malware.

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=introduction+to+geometry+proofs+desmos+answers
    • http://zamiwabo.tipsyglasswinery.com/uploads/1/3/2/7/132740829/4b7cb0f7ddc829a.pdf
    • http://files.resortattractionsllc.com/uploads/1/3/0/8/130814124/lisoliw-tapix-vuxutag-dajam.pdf
    • http://mafixaxo.sandyblaisdell.com/uploads/1/3/0/7/130738720/5a92c3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2400/6820/files/34509978930.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/anatomy_and_physiology_cardiovascular_system_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/37986846031.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/teamviewer_9_full_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/certificate_of_conformity_form_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/wibomet.pdf
    • https://cdn.shopify.com/s/files/1/0461/7329/0649/files/41284739503.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/26731107569.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/make_me_lee_child.pdf
    • https://cdn.shopify.com/s/files/1/0429/3636/9318/files/66943582896.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/kejufaliz.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_off00007a52.bin
5bf3241a804872019b01386128a27f33db77c5bce992e661f8ae202aa575b0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 5572 bytes
font_01_sfnt_off00008d48.bin
b200811c86f6bff576d2f2c53ba27e8e7937fadfe89998239ca672a6594e82f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 10244 bytes

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