Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a46984ed312670…

MALICIOUS

PDF

52.4 KB Created: 2020-08-07 05:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a0819ab1a0f94cf5a3a4be50afe223a SHA-1: b2e753fbf46e09a135d4951a2c8e7806bb152485 SHA-256: 70a46984ed312670ca825ecfe00519e257c5f1528fa0fd1da85314a03ade8a19
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing.

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=cell+culture+media+market+pdf
    • http://pexorage.figlearningcentre.com/uploads/1/3/1/3/131384429/tutej_kafejuxolara_pokuxitid.pdf
    • http://lotifapil.fourteegames.com/uploads/1/3/1/3/131398560/abca88.pdf
    • http://files.morningstarcommunity.church/uploads/1/3/1/4/131438539/degilobugaziwulijum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/xikogaditodipixis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/causas_del_cancer_de_tiroides.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/zetodoke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/4_star_hotel_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/importance_of_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/ketogenic_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/50808374762.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/33497227020.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_off000083ec.bin
74e65bd7e0fa58efe22ccfff32a711111e59b6b18ba2db8e7109bd476eb6f715
pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 5092 bytes
font_01_sfnt_off00009525.bin
27837c9ad849a0f26afc7111a3921393161e337c46100b26b7d4cd98ed6163be
pdf-font-stream PDF embedded font (sfnt) at offset 0x9525 14928 bytes