Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f47499e7b1a63d…

MALICIOUS

PDF

33.0 KB Created: 2020-08-15 12:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b5d11050dc98e1bf4e2a31276b6deb SHA-1: 198a5a6479e31c7a7367bb15e0112e136580608a SHA-256: 00f47499e7b1a63d4a5ebb8e90a7862df7859f79f20493b9633a84e1c7dd1835
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, also contains this URL. The heuristic firings indicate this is a malicious redirector and a link farm, suggesting an attempt to either distribute malware or engage in SEO manipulation for malicious purposes. No scripts were extracted, limiting the analysis of direct execution vectors.

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=aiaa+dbf+reports
    • http://files.sorrowfulmother.net/uploads/1/3/1/4/131407067/nelesosoduba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/opsc_aso_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/kakirexalidofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/20600227644.pdf
    • https://cdn.shopify.com/s/files/1/0434/0252/6887/files/manual_autodesk_maya_2020_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/74522204614.pdf
    • https://cdn.shopify.com/s/files/1/0447/4866/9079/files/fojofog.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/minecraft_spawn_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/65131415495.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_off00004480.bin
ee371d2d68442ed62fa245e0372300ea9e8003e0d8b6fe341863a0c879871f99
pdf-font-stream PDF embedded font (sfnt) at offset 0x4480 5132 bytes
font_01_sfnt_off000055f7.bin
dc82a2558194e6a1aed2af7dce98dd4d3caf115d04cbad2dc98afccbcc860388
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 9848 bytes