Malicious PDF — malware analysis report

Static analysis result for SHA-256 008f3418f2a62a38…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 08:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85ea3541f3bc05025dd8e3e6f2d5736d SHA-1: 02b967c5b74f59ad1adeb28b94ae863c26173e92 SHA-256: 008f3418f2a62a38b6e2961cb9943b56a1c18f361b4baec4e0b386f08a2dd7f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the same lure text and URL as the malicious link. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive link.

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=the+secret+life+of+bees+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2486b5_78b132f71f994af7b3a271095bfa7417.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9d89722f75f483983a8e7d72e5640f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e75fb7ffeecc407a85592424d02bffef.pdf
    • https://static.usrfiles.com/ugd/b8c837_baf03b0f78af4595a2ef86900b87d4ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e8dc1c3d41843349c66fd4d5ca0aa5b.pdf
    • https://static.usrfiles.com/ugd/c63dba_ca9948d184004be38633289fd81fc353.pdf
    • https://static.usrfiles.com/ugd/b4609a_18bafe208fd74349ac390494ac5cc4b4.pdf
    • https://static.usrfiles.com/ugd/078c79_796c20ccaf914786905826deb50d9a98.pdf
    • https://static.usrfiles.com/ugd/3f4b99_f2ff5f8cff0e46e8b1d8bc352b4375d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f731a8c4a674aac823e2ccfa3b2ae6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_49784e5166614353b71c0d5154008531.pdf
    • https://static.usrfiles.com/ugd/b8c837_7512fdf9bc5245d49cfd1570251fa20f.pdf
    • https://static.usrfiles.com/ugd/e5412a_44bbbcf5b7c245af87dedb7a83a1d73f.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_off000067ce.bin
c5e6873c755c16986e1cfd1b57bb6e4b06c663175dca928e2f65df0d8f310ce6
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 5292 bytes
font_01_sfnt_off000079d0.bin
11e3327e3733fde018d87cc981497a30763cffd7f217790269edf5a85e53f632
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 10320 bytes