Malicious PDF — malware analysis report

Static analysis result for SHA-256 01683f7bdcd5984b…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 13:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99461f80aa2a772474054221cafc8c6 SHA-1: 72646b56fac3f9da120a542fb9f9a10466b6878d SHA-256: 01683f7bdcd5984b33d6839fbe1bca317ae6453999833a977b5c83f4b8b6abdd
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a malicious URL, disguised as a movie download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document body also contains the malicious URL and several other URLs, likely part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic.

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.ru/wix?keyword=chennai+express+full+hd+movie++1080p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/noramejixekaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/xeladezuvulibakekomabep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/nanozimote.pdf
    • https://cdn.shopify.com/s/files/1/0445/6411/9716/files/heterogeneous_and_homogeneous_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/pofedigewexubelunizivu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7031/files/android_ndk_eclipse_tutorial.pdf
    • https://static.usrfiles.com/ugd/3aca14_4b78d94a74264959aa068c6bebde4bb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2162611fe1b243b7a8ade55af71b7961.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e3106e17c541dea4c45aae69730945.pdf
    • https://static.usrfiles.com/ugd/b8c837_404531e346b44571b85ab469ac98a2ca.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_58e42e7ffe6349238ec4a06489724c8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccb8a125ba5a459f8f601b6bfbbbc0f4.pdf
    • https://static.usrfiles.com/ugd/5a1791_e0b9c161b139499da3b59c254452ea86.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_7a9820ac66904360b1ef94a045ce6d60.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_off0000507a.bin
25ec861731f2716b1206bf0f42d5ff8bec19e9b75c7484a752d61fdbc04a6cba
pdf-font-stream PDF embedded font (sfnt) at offset 0x507A 5700 bytes
font_01_sfnt_off000063c0.bin
ed090c5ed68656fdc0e212a6be81bbd733bf391044041810135fe1fc80d7f954
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 10240 bytes