Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5e6ca7a8de19cf…

MALICIOUS

PDF

44.9 KB Created: 2020-08-10 15:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bfa9f8849e2ee1a40e466ab9322a16d SHA-1: b3bd1771f7b860c3d00b7ee32a5942c446040b3b SHA-256: 9c5e6ca7a8de19cf9fe6854111a97946fb0ad85b30c0614a13dfc4be17f1a74e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. This suggests the document is designed to redirect users to malicious sites. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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=understanding+mathematical+notation+pdf
    • http://zumubabuf.amykaissar.com/uploads/1/3/2/7/132740214/gilubeliza_befubupubol_jofafakoropaxi.pdf
    • http://fufanixup.kellytruax.com/uploads/1/3/1/4/131453574/d8572.pdf
    • http://files.campbasel.com/uploads/1/3/0/7/130738712/2324958.pdf
    • https://cdn.shopify.com/s/files/1/0433/4682/1278/files/tijesavonid.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/sojos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/mivorudurakitaxinew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/neninejoliwurar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/allianz_travel_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/occupational_health_hazards_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/2210/4229/files/96424043694.pdf
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/37486581239.pdf
    • https://cdn.shopify.com/s/files/1/0428/0467/4727/files/vimit.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/91981226467.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/3484542904.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0952/files/53249059670.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006322.bin
5cc8a5865fb07a19dc62094f7aa3dd7f9e37281428553a06dcaea7178a9e8b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 5348 bytes
font_01_sfnt_off00007519.bin
7ea88cd5d574c9d575f3495036ebbb85db398e8d8066c81656be9255b59d37a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7519 10628 bytes
font_02_sfnt_off00009892.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9892 4324 bytes

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