Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a62a5b1c20e6813…

MALICIOUS

PDF

39.1 KB Created: 2020-08-08 08:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2100eec4467b7fd3cd7b7cace3a3850 SHA-1: d6a21b49eca30e3346a066ab4399050204ccc8d6 SHA-256: 5a62a5b1c20e681339492896fc02f08b2afbca7ed2086069c3e7d45a31bdf17e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is used in a lure to download further content, likely a malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a broader campaign to distribute malicious content. 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=formulas+in+chemistry+pdf
    • http://delafusum.couhigpartners.com/uploads/1/3/1/6/131607062/9493304.pdf
    • http://files.mariahhill.com/uploads/1/3/0/9/130969426/razuwiwezovelo_wipapilupuwakor_mafixiw.pdf
    • http://files.northwesturologyaz.com/uploads/1/3/1/4/131453984/2758515.pdf
    • http://files.klineglazeservice.com/uploads/1/3/1/6/131606231/visukuzozuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/jilepuzokitenewunulob.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/pefuzozexisalobipujadugos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/30207988684.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/71270883728.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/arduino_rgb_color_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/ruvapug.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/basic_multivariable_calculus_marsden_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/histrionic_personality_disorder_scale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/poultry_biosecurity.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/monabibugiguwubazew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/13130881866.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/14947778788.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b5d.bin
f4880f44ac57622f73f4c0200fecb8dc6dee082dd64e3cd8ec5236848ec13870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5D 5452 bytes
font_01_sfnt_off00006dc6.bin
b11bb4e2ff0da525448179b115ee3504c679bd730ae18a3dcb8da4aa97082034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 10000 bytes

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