Malicious PDF — malware analysis report

Static analysis result for SHA-256 630c0bbe04a5ec33…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 13:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c08194fac5072374d76690982d4dcca SHA-1: 2627eb1e7bf47a68607d2a05f44057d41da50f6f SHA-256: 630c0bbe04a5ec3304e7b4abf1cd677a233b0a3d671ec9fd903d18bae437b493
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/pify?keyword=answer+have+you+ever+been+arrested`. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document also contains a large number of embedded links to other PDFs, suggesting a link farm or SEO poisoning attempt. No scripts were extracted from this sample.

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/pify?keyword=answer+have+you+ever+been+arrested
    • http://files.empirephilippines.com/uploads/1/3/1/3/131380786/3003ae6a76d9.pdf
    • http://files.bvda.org.uk/uploads/1/3/2/6/132681885/labelejumovetixumit.pdf
    • http://jixanup.camwenrich.com/uploads/1/3/0/9/130969723/9f45f641710e10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/40239434629.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/piwunekedodilekagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/vofefozagofawofagolor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/nakama_1_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/asvab_math_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/93930286825.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/81773341212.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ca.bin
c0928f9773063623b64100ae85a12604605ad5300130509ce379ab4304068b72
pdf-font-stream PDF embedded font (sfnt) at offset 0x59CA 5096 bytes
font_01_sfnt_off00006b1d.bin
95f5d0f50e9308712982e60fc09bf4ef3dc7d750fe746917623b91ea62ae1640
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 10128 bytes
font_02_sfnt_off00008d81.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D81 4324 bytes