Malicious PDF — malware analysis report

Static analysis result for SHA-256 715f30b2dac59535…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 17:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b91348cea297f7d01712afa4b8ad525 SHA-1: c4168233485249bd7ca18a6ee0f997947717c7ec SHA-256: 715f30b2dac59535188f842ab6ab5a7d00b13245e8bc170c96c4d39520c029bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site or download. The document body and heuristics indicate a large number of external PDF links, suggesting a link farm or SEO poisoning attempt, with the primary malicious link being the most prominent. No scripts were extracted, and the family is unknown.

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=do+hard+things+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/74675004606.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/pafola.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/app_to_test_battery_health_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/mejasagamokusureziwepoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/kegunasavuduxisix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/google_maps_pin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/20117250439.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/ruzetezebitokosetol.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/28236533652.pdf
    • https://static.usrfiles.com/ugd/856cea_19caed2a58b544a98deb09135a645782.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8d5142e7c894a51bdee1eaed8d5c0eb.pdf
    • https://static.usrfiles.com/ugd/191a6d_5220ae9353304ded909a52ce968debc6.pdf
    • https://static.usrfiles.com/ugd/362633_0881520de8cc428b989e9c0dbd8faf2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_04441d11a284475b909021614dadf60f.pdf
    • https://static.usrfiles.com/ugd/2b3f46_0bd4a6e994d547a9a90812723a313c3e.pdf
    • https://static.usrfiles.com/ugd/0c41e7_fb83c880d06946278798556a5f9d8fe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_574a705aa07d4f799105fe34f2ab17ff.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006835.bin
ab66e4a97962f09e6e8722b5dcf31fd6a51e835bd3f0460497d577dc50a20dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6835 5476 bytes
font_01_sfnt_off00007acc.bin
d5d12403a987d34acd9596de8fb41c20495e5653eb47222c081f5ba27afc13ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACC 12840 bytes

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