Malicious PDF — malware analysis report

Static analysis result for SHA-256 1073bccce431966a…

MALICIOUS

PDF

44.3 KB Created: 2020-08-24 01:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137b4cf88786fcc28386d37171cafc47 SHA-1: ddde210d175a53837893a924f943fc2ff7dc05cf SHA-256: 1073bccce431966a186a108948e16c2fd9f576a66446533f84115e422eccdc44
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=gap+analysis+template+xls', suggesting a phishing lure. Additionally, a large number of external PDF links were found, indicating a link farm, with 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf' being the first identified.

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=gap+analysis+template+xls
    • http://files.artwaddleboerne.org/uploads/1/3/0/7/130739024/wogoso.pdf
    • http://files.thespringschurch.net/uploads/1/3/1/4/131438217/laforokos-jizina.pdf
    • http://zedafu.valeriekacianyoga.com/uploads/1/3/0/8/130814017/2637450.pdf
    • http://files.saddlemachine.com/uploads/1/3/2/8/132814276/0ee471e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/symantec_class_3_secure_server_ca_g4.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/vexanezefejivosedubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/rujeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/49566983989.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/savisopix.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/antibody_types.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/64536630552.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3230/files/chuyn_t_file_jpg_sang_trc_tuyn.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5565/files/the_agricultural_marketing_system_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/pariju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/6437056154.pdf
    • https://cdn.shopify.com/s/files/1/0434/5603/7016/files/gunir.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_off000070d6.bin
3c71c6f753f63624a178bd8d6a90ebea212f4d105f78b45f13a26aab68f297d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D6 5068 bytes
font_01_sfnt_off0000821b.bin
25120c8987c90dcd6d04c91302050604c28d7fe29de81f1f0db1838529ae8c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821B 9964 bytes

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