Malicious PDF — malware analysis report

Static analysis result for SHA-256 6626028a669b6a46…

MALICIOUS

PDF

38.6 KB Created: 2020-08-22 09:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e4287063fde3a8280d5b44bcc0cc524 SHA-1: 56592ed1e9370cd03413addd05fa2591b439298a SHA-256: 6626028a669b6a46d7a6260dafcb134f552b2ebdbb9875f2971d3e50c74e06ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure, suggesting a phishing or scam attempt. The document body, though partially obfuscated, contains text related to 'business card template avery 5871' and includes the malicious URL, reinforcing the lure. The presence of numerous links, including one to a known malicious redirector, indicates a high likelihood of malicious intent.

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.cc/pify?keyword=business+card+template+avery+5871
    • http://files.arkangelcreations.net/uploads/1/3/2/7/132740836/wewarup.pdf
    • http://files.savannah-storm.com/uploads/1/3/1/4/131453396/2705625.pdf
    • http://banuromem.trfike.com/uploads/1/3/0/7/130776582/4069634.pdf
    • http://fejexalif.kingschapelashford.com/uploads/1/3/1/8/131856257/jedij-kimivaxijumosa-wamuvimixawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6615/5430/files/20163690796.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/public_administration_an_action_orientation.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/22144010856.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/dagojupovunuwotonugalelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/telonisoxasipevig.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/backward_bending_supply_curve.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/chapter_10_section_1_money_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/6604/7129/files/48857446134.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/pebobuzelokifivamu.pdf
    • https://cdn.shopify.com/s/files/1/0448/7115/5874/files/gomuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/89782620886.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/bewomibonanewoxoxupad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/zarekafe.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_off000056f3.bin
59a4c0efd147e7421d554737fd8561fed6702d87ff1496b52ae241aa9570030a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F3 5880 bytes
font_01_sfnt_off00006af8.bin
3e6682ddfa14a934b6c76b193ecf0d70cf32a864ddcf40ff2f3c034c9ee3f05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF8 10160 bytes

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