Malicious PDF — malware analysis report

Static analysis result for SHA-256 4caf2ed5631e391b…

MALICIOUS

PDF

37.2 KB Created: 2020-09-12 15:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56214bfcd69dabe5692eeccfb999a22a SHA-1: 891589e3a8425403ec017d663091fba10da8a933 SHA-256: 4caf2ed5631e391b08fe59b3af277e984d8419a06f2ab8682af68bb1393bb8ef
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the ultimate destination for the user. The document body is heavily obfuscated and appears to be junk data, but the presence of the malicious redirector and the link farm strongly suggests a phishing or malware distribution attempt.

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.me/wix?keyword=guidestone+funds+growth+allocation+fund
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/56991911135.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/43776869781.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/sunefimulopinixoguris.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/29015366815.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/farubigitexewarogijamuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/89587196033.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/robotic_surgery_history.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/bilawesasonuzupapoz.pdf
    • https://static.usrfiles.com/ugd/f34823_099485b6c54f4ed094f5d80c40be4812.pdf
    • https://static.usrfiles.com/ugd/e4ff69_eb6d5c8613db42e9b9f48584a381dcc6.pdf
    • https://static.usrfiles.com/ugd/5c7528_2b1f73e0524c4d3393df4cc1d423a187.pdf
    • https://static.usrfiles.com/ugd/5de1df_8d98744f5b2442a6a168f57d3b6b24dd.pdf
    • https://static.usrfiles.com/ugd/17ce20_e7673a116d96429d9a9b281c35a56f6e.pdf
    • https://static.usrfiles.com/ugd/ca32a8_0e085ee6930745518bf50600501e66cf.pdf
    • https://static.usrfiles.com/ugd/10e3af_a1773b22fb0b409790882a73a42c2d74.pdf
    • https://static.usrfiles.com/ugd/943725_ae29ac9464b949b4838801c82e133427.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_off00004e9e.bin
f70cd65c8a36e24d1874ef25e940032f9089e636e9f8ea5361bd290e49c55182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9E 5408 bytes
font_01_sfnt_off00006110.bin
e9340fafe12e535bdb30c3e46d5b1924079c52cfa0f2309dfb399bb0eb4597d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 11068 bytes

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