Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c307999cad5fa2c…

MALICIOUS

PDF

46.5 KB Created: 2020-08-29 18:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d218932a114dbcb64395d414ad569a3 SHA-1: 9778a3f712c6013e7783c36b6d9f3ac12ea465d3 SHA-256: 3c307999cad5fa2c4855ece5188652b221cfbde841a3648c187ad06c2e3bb731
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=airbnb+home+manual'. The document body, though heavily obfuscated, appears to contain text related to an 'Airbnb home manual' and the malicious URL. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify and static.usrfiles.com domains, likely for SEO manipulation or to obscure the primary malicious destination. No scripts were extracted from this sample.

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.cc/wix?keyword=airbnb+home+manual
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/7266336982.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/nhtsa_sfst_manual_hgn.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63908687591.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/bundesheer_neue_uniform_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/papevu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2174/3781/files/9488318059.pdf
    • https://static.usrfiles.com/ugd/b7082a_cb05d81490224eaebd764b8c02a6183c.pdf
    • https://static.usrfiles.com/ugd/9e41f0_6a113b657b8a4497bf4e6603419871af.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6709bc75bdb48f1aad4cab8ec6c77ee.pdf
    • https://static.usrfiles.com/ugd/83b1b3_14f93caebeb44019822c8386642d20c7.pdf
    • https://static.usrfiles.com/ugd/ca300b_fdffc59651504d4fa1293e91ca2ae5f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_beaa91321ad64ce6a6dc9611eb874beb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb4b813d100d407e8cdd5574de92dee7.pdf
    • https://static.usrfiles.com/ugd/ae15ca_cfe4db8974694edb934a219370c5094e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b40.bin
c0b3037fd2179e0add5223a1e24120913dba1b6c9b265ae8eab988eff806ed93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B40 4680 bytes
font_01_sfnt_off00007ad7.bin
e19fd8dbabb003386c337366afb180617458ed4bf20826098a1d1766238ec190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10704 bytes
font_02_sfnt_off00009f66.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F66 4324 bytes

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