Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bed873bdd9ceee…

MALICIOUS

PDF

33.7 KB Created: 2020-08-18 19:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17c23cc13b8128f5294ebed66471e460 SHA-1: 48f664262133d1c29c3a2f6e4f224e39cd782081 SHA-256: b0bed873bdd9ceee68d366f795973491ae2cd4b0fc6add52aa41f6a69b975ccd
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which are part of a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. This suggests the document is designed to lure users into clicking malicious links that will likely lead to further compromise. 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.com/pify?keyword=bryson+tiller+patient
    • http://files.mrmenth.com/uploads/1/3/1/4/131409037/6256250.pdf
    • http://files.tsffl.com/uploads/1/3/1/1/131163867/7104857.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/baduzevosujobokerijaja.pdf
    • https://cdn.shopify.com/s/files/1/0444/5339/6647/files/aerospace_manufacturing_processes.pdf
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/tegirus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8635/6375/files/sotijejovinimisajor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4039/0819/files/labevewazekadamoxubem.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/berliner_platz_2_neu_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/rozekasabolesazejedup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/junozuwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/sanford_antibiotic_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/15584425486.pdf
    • https://cdn.shopify.com/s/files/1/0433/7601/7559/files/courtney_adamo_gomi.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_off0000474a.bin
d2ccf66fac6a1af820cdd14d8c071c03c37b24b0a4258e81b36ef7f5ba1c8023
pdf-font-stream PDF embedded font (sfnt) at offset 0x474A 4964 bytes
font_01_sfnt_off00005841.bin
ec1a99d1081261333ee6ca1ffc588db0997da42f52f1f5ddaf5859976d2cff6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5841 10040 bytes