Malicious PDF — malware analysis report

Static analysis result for SHA-256 acacfb7f27a75a68…

MALICIOUS

PDF

82.0 KB Created: 2020-08-31 05:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ea53d109f0ef13344141c42fb9c3ac7 SHA-1: 819472ee0dee3680fe25c5bc40d300ca0c70b383 SHA-256: acacfb7f27a75a68ef6a07c8e171018b5fc3bbf27cfc3b5ba2fca54b7849a94b
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a redirector link to ttraff.com. This suggests the document's primary purpose is to redirect users to a malicious site. The embedded URL and the PDF structure point towards a phishing or social engineering attack.

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=elkoy+summoning+guide
    • https://cdn.shopify.com/s/files/1/0448/0620/9702/files/corpus_juris_secundum.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/18943700297.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/wakuvuvanulumunubulo.pdf
    • https://static.usrfiles.com/ugd/f55bec_ad15721b133c44688f9647e66fe04d63.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ff6074f4c21471cbad738c20b0fbe79.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/56466524008.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/16666399598.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/68680826978.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/75013907793.pdf
    • https://static.usrfiles.com/ugd/b8c837_f602e6d0c98f4ab48961cb3c154c89d3.pdf
    • https://static.usrfiles.com/ugd/12745a_5257c583215141fe88f94a0aacc44bd2.pdf
    • https://static.usrfiles.com/ugd/5a1791_191202b3ba6f4d10b615f701c6654c9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb6451e830434a869b0256e0a060551a.pdf
    • https://static.usrfiles.com/ugd/a44510_6006a215a0dd4a88bfa3b9c628165b45.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_off0000f80d.bin
239c4483dd9724eecc5f6a1227a33a24958c51ece151ead19fa96c88e05b3e51
pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 4764 bytes
font_01_sfnt_off00010829.bin
5a7c556b291e4054139e885bcd6c7cd56c7ef07119ede333f057d0c6fb47d1e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 10752 bytes
font_02_sfnt_off00012cd9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD9 4324 bytes