Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e0f08d4409028e…

MALICIOUS

PDF

35.6 KB Created: 2020-08-22 23:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f21fc253da932140394c20b345ff69ce SHA-1: 848bc523ef92c54e17ecf4fe7ddd671d598f2710 SHA-256: e9e0f08d4409028e277e01549796f7834c02c8e9aae9281cd55551b80bd9c07d
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into malicious sites. The document body, though heavily obfuscated, contains text related to a 'free volitional questionnaire pdf' and references the malicious URL. The presence of a link farm with numerous PDFs hosted on Shopify, alongside a suspicious domain, suggests a campaign to distribute malicious content. 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=free+volitional+questionnaire+pdf
    • http://runakaz.elizabethjunebergman.com/uploads/1/3/2/3/132303245/249889b2b1253f1.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/57263690513.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/chennai_gana_video_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/63774443594.pdf
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/calculus_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0447/5266/6778/files/17327792837.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/pifore.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/gre_analytical_writing_argument_topics.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/84987815003.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/dutiroxaweguzufodunojiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/a_monster_calls_patrick_ness.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/2095006312.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1387/files/orthographic_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c92.bin
5db70054897174ea876e32269b9b365302d9bc7f91d93ffc939afc6f8ada4d8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C92 5176 bytes
font_01_sfnt_off00005e40.bin
b22bb0ed239af9408e3e8e4867015aeff9e4710770df37e633e0f56c7b8268df
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E40 10376 bytes