Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06fea3601d8bb28…

MALICIOUS

PDF

48.2 KB Created: 2020-08-29 02:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c8aa064246e86970ca4effbd030527 SHA-1: db54ca6227e44aa3c837f054bf02cefd8edd9767 SHA-256: a06fea3601d8bb28f523ef22adcac08709d794f6d89f2ba602b4082f78bec35b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely to improve search engine ranking and lure victims. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector suggests an attempt to lead the user to a malicious site or download further payloads.

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.com/wix?keyword=apocynaceae+family+pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/dnd_3._5_players_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/39957377411.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/dagunafigemeni.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/tadalezot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0076/6369/files/dowesitafetupagimexige.pdf
    • https://cdn.shopify.com/s/files/1/0462/3535/3239/files/nepajozufiwefix.pdf
    • https://cdn.shopify.com/s/files/1/0435/6889/0015/files/dedolubujeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/athlean_x_program_reddit.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4c5e787f2bd47cd926fb14535470c8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f21abd05af4a4735988658ba001e0115.pdf
    • https://static.usrfiles.com/ugd/b8c837_160e3d8482a844458b9323f604b162d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_82679c4eabfb46a6a021c3e3b9e10dbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbda78b3ee63433cb05b7472cff4917e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b7edc73100e460e9aca7af4d516351d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f354766dc8c496ab16c26d508c0557a.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_off000069b0.bin
b98eb21a05c332ae08ee2a96bd599b04b2b299933c025c5134418c81ddff6fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B0 5120 bytes
font_01_sfnt_off00007b0b.bin
f2bf05a86541c6684b8d03f4da720deb90f5d91e703832e038176c54ba17c1d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0B 10320 bytes
font_02_sfnt_off00009e44.bin
95f2a8319533f051e584a9e2aa38e8d42f7eb419abe795cf0dce2d6390e2c0a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E44 16204 bytes

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