Malicious PDF — malware analysis report

Static analysis result for SHA-256 181d612d63cc8477…

MALICIOUS

PDF

76.7 KB Created: 2020-08-15 20:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78837bf9b39c8c0b1240964e0f846666 SHA-1: 9b5a27654f0ae00a02627d69d27ae7669b40e3a7 SHA-256: 181d612d63cc84774d5af2cd3d46166c042ca0626ecbf9170608ea27f25a288f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body and heuristics suggest a lure related to a 'rig veda explanation pdf', likely a phishing or scam attempt. The presence of numerous external PDF links, many pointing to Shopify, suggests an attempt to obscure the malicious redirector within a larger link farm.

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/wb?keyword=rig%20veda%20explanation%20pdf
    • http://tirerib.fordjudoclub.org/uploads/1/3/2/8/132815196/497375.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/funny_ssid_names.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/xuguxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/politique_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/36625027083.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/jakeenan_gant_scouting_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/vusanepagukofixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/glass_curtain_wall_section_detail.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/phase_angle_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/additives_in_concrete.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e4.bin
182a0532516cb35f35785235db012aff1bb6b00f0ae6370f466f0dbba8e1658e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 5072 bytes
font_01_sfnt_off0000e34d.bin
81a9d5c28ee7b09e938b73af239e80582ec7282fe72d031aa397087c6402ad9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 14472 bytes
font_02_sfnt_off000110fa.bin
b2420688700ae8092c1c17765f76d7be945926092e36c06f35a393ba2fc63381
pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 16224 bytes