Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1988cbe41abb91…

MALICIOUS

PDF

41.8 KB Created: 2020-09-17 15:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb174026b700610c7183d7078d04290c SHA-1: 80e7505b4756e0a352979d68c410362e13ceef92 SHA-256: cc1988cbe41abb91442df10ed7e616d3ad9b24813feef6fd031c8fb22137a195
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, includes a URL that appears to be part of a lure. The presence of a link farm and a critical heuristic firing for malicious redirectors strongly suggests a phishing or redirection attack. No scripts were extracted, limiting the analysis of direct payload execution.

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.me/wix?keyword=the+santa+clause+white+christmas+scene
    • http://zotawa.kelleyintegrity.com/uploads/1/3/2/6/132681409/6062884.pdf
    • http://jirom.stuffanthings.com/uploads/1/3/2/7/132741508/pofinapuketegoto.pdf
    • https://4d2be5b7-5155-4913-9dee-c1f280eb6f09.filesusr.com/ugd/9d7ad9_bba126593cfe4b76b7b10b33357e414c.pdf?index=true
    • https://0dae4305-9c1c-4cf5-b305-50d32b9d71ec.filesusr.com/ugd/9d66c7_defe8cc381ec444cb17f4eb2c1fee6df.pdf?index=true
    • https://b2ddbeac-725e-4318-99ea-120554750e43.filesusr.com/ugd/ce4b7c_d0b82e6585034c4bb294e19c80af6f6f.pdf?index=true
    • https://ce18681b-4031-42bd-a179-23f7936fa26b.filesusr.com/ugd/a2e20a_e9134a69e4ce4b31aa87de216d5a0d82.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0460/3143/7983/files/printable_basic_algebra_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/84877780768.pdf
    • https://ebc38bd6-de7f-432b-973e-8b26d196daef.filesusr.com/ugd/9734e7_0c7fe0cd6ce542c8ab61931f9bb63bdf.pdf?index=true
    • https://cbbb2af7-fba8-4217-a751-c703f3d607eb.filesusr.com/ugd/26481d_5780972451a14740abe14f9fe2683447.pdf?index=true
    • https://fc1c1b26-4d3b-493c-a9a7-d825d5cb76d4.filesusr.com/ugd/db93e9_89dbb83d692d43409b63dea91d662b9e.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006613.bin
a5ecb758f66c35d2e08ab3414a1f16884ff05e355e61dd919af47059d6c8c178
pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 5080 bytes
font_01_sfnt_off0000773e.bin
7760b9c72427d7a9d0a1abd75f1b26ab050fb816fe3731dbc557eaef342147ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 10376 bytes