Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabfd6f69ac141c5…

MALICIOUS

PDF

33.3 KB Created: 2020-09-01 23:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc2c468e06e35db3bb4ccc546b299491 SHA-1: 48537626bb8b22fc13d427c8f1f8dc5f2dd5d663 SHA-256: fabfd6f69ac141c5c5d76366c17f8c77efb339cada0490d4c19bb6eb3f239146
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded within the document body. This redirector likely serves to obscure the ultimate destination and potentially track user engagement. The document body itself is heavily obfuscated but contains references to the redirector and numerous benign-looking PDF links hosted on Shopify and usrfiles.com, suggesting a SEO-based lure to drive traffic to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=nyc+hourly+weather+report
    • https://cdn.shopify.com/s/files/1/0431/5349/0071/files/5793278385.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1526/files/jugarisewudunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/mililozexuwexarel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/candy_desktop.pdf
    • https://cdn.shopify.com/s/files/1/0443/3153/2444/files/spoken_english_topics_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0450/2798/3510/files/69533409617.pdf
    • https://cdn.shopify.com/s/files/1/0460/1066/3079/files/fevodabe.pdf
    • https://static.usrfiles.com/ugd/69695d_4320421b97ca4c2ebc088e6a066dea03.pdf
    • https://static.usrfiles.com/ugd/87b9a8_0dab3584989e4b28ac898de9ca4252bf.pdf
    • https://static.usrfiles.com/ugd/9ea91e_1a5a094866c246639f4335f7672d4a07.pdf
    • https://static.usrfiles.com/ugd/b8c837_b53e9525bd1749be8c2034ce0e38c3fb.pdf
    • https://static.usrfiles.com/ugd/b4609a_ef85750b837444a68028d2a6c1b1a8ff.pdf
    • https://static.usrfiles.com/ugd/a640e9_c2347d3463bd41129c880e3e7e449598.pdf
    • https://static.usrfiles.com/ugd/89c6ad_64353de236c241b097cad654849d93d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_210a4ab052ec42d4be215df5bd1cca5b.pdf
    • https://static.usrfiles.com/ugd/3649d2_e72ca1b9992243e58c52f1dec95c0e2c.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_off0000474c.bin
3d6d6e54a7ced968846be3fa2fd0797d550998e82aa69e348272eb0112375b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x474C 5008 bytes
font_01_sfnt_off0000586d.bin
a36eca7af24d640891e94449c029d9ad6b1e6b318a3242390d2f2b7abba39754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x586D 9444 bytes

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