Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e4fccd38dae80d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 04:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6491297b2fdeeb8f8e3a567f95e35339 SHA-1: e0c61a0e1e0957784691551c7341d7c61c583b60 SHA-256: d9e4fccd38dae80de4abc4bb770aadf5f21a38d739100487449b132ec8c3ec3e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=hp+psc+1600+driver'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains text related to 'Hp psc 1600 driver', suggesting a lure to trick users into clicking the malicious link.

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/wix?keyword=hp+psc+1600+driver
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/xetoniwizupifoxunawaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/33188602909.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/vawafos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8471/files/vafakibal.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/66573257343.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/43840427553.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/fusox.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/download_basic_tactics_for_listening_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/6999699080.pdf
    • https://static.usrfiles.com/ugd/b8c837_855f1828950c49308e396aa98137963a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03c5b973cf44b979260c8ccfe8d9224.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f37fc9c1784e3aadce6cbab6f40feb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a41ee739c4c04b99ab9cfd73163e7638.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/urodynamic_studies_in_adults_aua_sufu_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/larunukizibukezojalafudod.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_off00006d3d.bin
1f241a9571e18f26c07e4268d1ef5bfe7020b9a31389c6798116b8b89c9a6b6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 5192 bytes
font_01_sfnt_off00007ef6.bin
eb9895ffdd99f281f9e37bd8965b9f94cf5c8dc958ac8375f25acace178c9a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF6 13544 bytes

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