Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b325155649ad0bb…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 22:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02929c7d1f1cfe77eaac4428d28ac717 SHA-1: 49142530afe7142dcd92af8ae481094b4b5b116e SHA-256: 8b325155649ad0bbf7f4f4883e0c932762c899a5d70bfc07160bd1b5846b47cc
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text, though garbled, includes the phrase "Bitumen extraction test pdf", likely a lure to encourage clicking the malicious URL. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=bitumen+extraction+test+pdf
    • http://files.fdthornton.com/uploads/1/3/2/7/132740462/xomiti-mulolibarofidit-lelevewifodo.pdf
    • http://relewiri.bttau.com/uploads/1/3/0/7/130776445/kugogakij.pdf
    • http://files.antiochdays.com/uploads/1/3/1/6/131606128/mefotamunepebep_rudesulelolub_lugisu.pdf
    • http://files.mintconditioncoinringcrafters.com/uploads/1/3/1/8/131857916/708146.pdf
    • http://files.ctni.org/uploads/1/3/0/8/130813841/kelizetikuvibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/jalixad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/mofagogegusa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/dexerexekunagetapoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/miginesopap.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/67535697455.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/single_stranded_dna_virus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/anne_ancelin_schtzenberger_ae_mes_aeux.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/cos_in_exponential_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/field_and_wave_electromagnetics_cheng.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/xewiforojute.pdf
    • https://cdn.shopify.com/s/files/1/0440/6060/6616/files/unamused_face_text.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/31154170301.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_off000063e0.bin
a3ec7dbdd165e263f5066e4da51ffc74194aa6a058cfc297dc94a5573c8ba540
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 5384 bytes
font_01_sfnt_off0000761c.bin
e5df8aea9596cf63291d3cd2587caef3a4e345f4c67dc1ba5cb7ea1c4aef4634
pdf-font-stream PDF embedded font (sfnt) at offset 0x761C 14520 bytes