Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b4ba1269deca72…

MALICIOUS

PDF

66.0 KB Created: 2020-08-02 07:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3cf27c01ece6d00edea6202f3ba65dd SHA-1: a71a44a481635fc3713bd5e361a050dd95f95ccf SHA-256: f7b4ba1269deca7246f0479f0f2c0aaf4c0152c225978245e6e02813a3758d3d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates a likely phishing or malware delivery attempt. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify, suggesting an attempt to obscure the true malicious destination.

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=fundamentals+of+english+grammar
    • http://files.packtenna.com/uploads/1/3/0/8/130874683/5183873.pdf
    • http://files.royalsom.co.uk/uploads/1/3/0/7/130740141/kunafom.pdf
    • http://files.russellitup.com/uploads/1/3/0/7/130775921/jiwodafowot_satuz_jugejaw.pdf
    • http://files.thecomputershophv.com/uploads/1/3/1/4/131411199/bbe79f1c489f80.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/69175401597.pdf
    • https://cdn.shopify.com/s/files/1/0438/8323/3448/files/fofuponutonivugepemaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/98120995521.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/27645171798.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/rudiwifizowiwerivuvolas.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/where_s_george_stamp.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/logikodinivedaku.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/xunufumuzunizijax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/mogenutixat.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_off0000c40d.bin
e3b8ed0c0699c7a41f334363224302e41c9cb17ffe37fa71c3d9ebdcd950e881
pdf-font-stream PDF embedded font (sfnt) at offset 0xC40D 5276 bytes
font_01_sfnt_off0000d5d6.bin
95f2a71fd390ab1e66ba40ac0230ba3c7251ca4da8770f929d42f862454fce82
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D6 11348 bytes