Malicious PDF — malware analysis report

Static analysis result for SHA-256 694bbb656b6f822e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-04 09:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5611a17c31093d3e58fb0a7584efe82d SHA-1: e8273d134378e71cc87189c099a7f01e5ab64824 SHA-256: 694bbb656b6f822e905dd6f540cc72e2f0cb79413a79c3d065e748eda429c5f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to redirector infrastructure or potentially benign Shopify URLs. The primary malicious link, 'https://ttraff.cc/wb?keyword=craftsman%208/26%20snowblower%20with%20tracks%20manual', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same lure text and URLs, suggesting an attempt to drive traffic to malicious sites under the guise of providing a manual. 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.cc/wb?keyword=craftsman%208/26%20snowblower%20with%20tracks%20manual
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • http://files.rorymacdart.com/uploads/1/3/1/4/131454850/wuzosedinag-ropivu-kuvegetefux.pdf
    • http://files.charmcityjunction.com/uploads/1/3/1/3/131398129/fenulomuto.pdf
    • http://jafiwuwo.pamperandpreen.co.uk/uploads/1/3/1/6/131607029/477cad2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/61282297871.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/nusadusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/zigexukozedevelukig.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/zitosezerikono.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/70670522396.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/86723125839.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/xogipamegepoxazewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/96174521213.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/rulunabemigeguke.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/13299814448.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/gipufevevebazuneboga.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6397/files/84677321535.pdf
    • https://cdn.shopify.com/s/files/1/0434/9650/5496/files/zakas.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_off000063bc.bin
d6e0f0cd0f4673c4e4253727ae4f540c06fe6d21cdc9f554e18e5343c7609960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 5840 bytes
font_01_sfnt_off0000778d.bin
831d684616816912d05f18c4b78f99853a43a51d62763705694820e64a2b68ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778D 10016 bytes

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