Malicious PDF — malware analysis report

Static analysis result for SHA-256 2902c95a1109e42b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 08:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fbd70babbed2d2ffe5e31cb3ae9ca94 SHA-1: 81478acf104195050e52cf6cf217fcb396d3e540 SHA-256: 2902c95a1109e42bdcfa07fba51e263515c936a44c82e557fde6a70f926175eb
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, and a large number of embedded links to external PDF files, many hosted on Shopify. This indicates a likely attempt to drive traffic to malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farm and redirector behavior. 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=imo+video+call++please
    • http://files.cloudcatchermedia.com/uploads/1/3/1/4/131437172/mijizav.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/11714895094.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/buzejonoxuvutemazekulutef.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/kenep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/nogukirov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/dj_audio_songs_telugu_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/35119242163.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/putufuwi.pdf
    • https://cdn.shopify.com/s/files/1/0458/1346/5254/files/31377001575.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/32950145126.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/7945522436.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2584/files/95108141547.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_off00005643.bin
8bab99e185071302f6a4458f62a6f4819eaa826b95f14bfa8ed6cf2297d2c57c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5643 5120 bytes
font_01_sfnt_off0000679d.bin
d5ed77b410c8ba9c8b29285cacffcb82707524159b3803a8c55f1a4d68e0cca1
pdf-font-stream PDF embedded font (sfnt) at offset 0x679D 10484 bytes
font_02_sfnt_off00008b99.bin
a75c19cb4705f41c978fc0d44fd89890753b832f2378094bceb28796b9bce1f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B99 16248 bytes