Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f6ea1e1920dfdb…

MALICIOUS

PDF

42.9 KB Created: 2020-11-01 21:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22343bd6f83d7769741512b1eb9d4574 SHA-1: 129db3f681eb8526350e4ed7f2d308f15747f526 SHA-256: 32f6ea1e1920dfdbfbc41754dda3e43e87614c4798eecc53ceb2d29396b7337b
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The embedded URLs suggest a link farm or phishing attempt, likely aiming to direct users to malicious content or malware. No scripts were extracted, but the presence of numerous links and the ML classifier output strongly indicate malicious intent.

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/123?keyword=google+drive+coraline+mp4
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5f95a4f83a704.pdf
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5f96337d65518.pdf
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/wetuxaxewajuludodosu.pdf
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/lofolokalagamorepako.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0497/8586/4343/files/dnd_urchin_names.pdf
    • https://uploads.strikinglycdn.com/files/e69a859e-3d73-4a66-b21a-36a9fffb78c9/78000853668.pdf
    • https://uploads.strikinglycdn.com/files/e0730b7f-35ee-41f5-a935-191e70a343e9/combitek_f23e_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/72950418428.pdf
    • https://uploads.strikinglycdn.com/files/7139d9a5-0e7e-4150-8b3d-d046ea49d161/gujuzime.pdf
    • https://uploads.strikinglycdn.com/files/96f0f99e-44ef-4db7-a71a-3f7ca887a185/55653826652.pdf
    • https://uploads.strikinglycdn.com/files/dee4ec5a-c12f-4476-8c8d-aa88673f99d8/guia_exani_1.pdf
    • https://uploads.strikinglycdn.com/files/20ee31ae-d2ba-48e1-8228-349b505280a5/66651318738.pdf
    • https://uploads.strikinglycdn.com/files/1de4030f-5d96-43f2-8a19-fff8e9b104bf/isentropic_efficiency_of_screw_compressor.pdf
    • https://uploads.strikinglycdn.com/files/799fe466-4eb9-461a-8970-273c8a2923c5/nenerupekixo.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_off0000687f.bin
f3e93a823b24ce3148d85dcb66aec1a4dc2573101e0a21a5c1fba7e24f9033bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x687F 5396 bytes
font_01_sfnt_off00007ad7.bin
9b1edba4b226d34c7d29f7a622f945ed46d7aa81f80c8869113c0cbd4ec962b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10640 bytes