Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b08cb9cdcbe68a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 05:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f5af8a2f332d2d9448887d69cad246 SHA-1: a7805a42d2ca81d935cce8a15fd1a9a6c28a805b SHA-256: 45b08cb9cdcbe68a715de47bdd8e8eb395c0be89a1b10afdb69a7215c731ea78
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=smith+and+wesson+mod+5906+disassembly'. This URL is likely part of a phishing or scam campaign, attempting to lure users with seemingly innocuous content. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or content-spinning tactic to obscure the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=smith+and+wesson+mod+5906+disassembly
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/tokemovikug.pdf
    • https://cdn.shopify.com/s/files/1/0469/9327/7080/files/duzolalipidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/vinijuxovima.pdf
    • https://cdn.shopify.com/s/files/1/0459/9382/0327/files/wenilotobelibaromufibuzib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/manteca_animal_shelter.pdf
    • https://static.usrfiles.com/ugd/04e6f9_e73fbe9e3b9e4fb6a8351e6e7939d7c3.pdf
    • https://static.usrfiles.com/ugd/ac51ce_fdc358ef018447a8a94a91592ad3da0b.pdf
    • https://static.usrfiles.com/ugd/21e6f2_fcb9be2499964e129efe68a844e0e091.pdf
    • https://static.usrfiles.com/ugd/b8c837_94a2ce10e3a84794aba2741327b599b8.pdf
    • https://static.usrfiles.com/ugd/e3c460_8bf6b212580b497ca1d64ced52a3b626.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/asa_anesthesia_conference_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/warojikuxib.pdf
    • https://cdn.shopify.com/s/files/1/0448/5795/0370/files/local_anesthesia_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/careless_whisper_piano_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/imperative_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7266/7296/files/xepefasolisepu.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_off00006856.bin
7d574df4cd85a05f17e94ec8169dff57787772d72ccc1f22aa35608114c172ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6856 5980 bytes
font_01_sfnt_off00007c8f.bin
34d36ebe329819dc5c3ed2e785c19157260e856387640d5186bdc00176db8924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8F 9996 bytes

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