Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38bc6124a9012ee…

MALICIOUS

PDF

34.0 KB Created: 2020-08-12 09:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a229f2d8175e7ffe95f6daba2226cf9 SHA-1: 0b67b13b940779433c1d043b29ab5d006170d667 SHA-256: f38bc6124a9012ee03f2e7fedb1e04fe154fc7dbf83c4c7a088dbfa5df78c606
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to 'ttraff.com'. This suggests the document is designed to lure users to malicious infrastructure. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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/pify?keyword=cane+s+menu+pdf
    • http://deguk.johndecastro.com/uploads/1/3/0/7/130776445/f02d66ca015.pdf
    • http://files.brendaknows.org/uploads/1/3/1/3/131382134/eb431082870fc8f.pdf
    • http://files.kbgaragedoors.com/uploads/1/3/1/4/131452989/11045a03c.pdf
    • http://files.studio-macs.com/uploads/1/3/0/8/130814043/bulusenesuk.pdf
    • http://fatov.sheilamyers.com/uploads/1/3/1/8/131856725/mavuzadupejibu-dutebep.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/49858815955.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/23292975253.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/xezutesunaduzoxutokivo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/80670731836.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/mp_anganwadi_vacancy_2020_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/9798579183.pdf
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/50554363806.pdf
    • https://cdn.shopify.com/s/files/1/0449/2718/9147/files/69585221172.pdf
    • https://cdn.shopify.com/s/files/1/0452/2229/7760/files/formalist_film_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4657/files/59202435645.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/york_diamond_80_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/61487980393.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/nemorujanedavinesisijow.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_off00004894.bin
64c25c3b833b1b24bfa30624e9afef2997dbb25607fc88c42c177ffda6096d95
pdf-font-stream PDF embedded font (sfnt) at offset 0x4894 4964 bytes
font_01_sfnt_off00005966.bin
ba69c3b52ae3033ec4ba17c9ec13324562a15cbcf0970d9e39a4caa537094f2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5966 9488 bytes