Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac01d6a076b4d594…

MALICIOUS

PDF

44.9 KB Created: 2020-10-30 23:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a856c81c681a05fc68a826cb06feab5e SHA-1: b37c517321f91defdd733b34b0f44875e9eebc38 SHA-256: ac01d6a076b4d594b457faf5c1521a710e631a715c136c602d4d4a61371bf2b9
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised with a seemingly legitimate keyword. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, as indicated by the PDF_SEO_LINK_FARM heuristic. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or redirection attempt.

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.cc/123?keyword=financial+literacy+final+exam+study+guide
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/7404194.pdf
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/6647562.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/mobuwuwipa.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/volisilitij_luperodebif_vaxulaxolirid.pdf
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/716287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tofizo/puxisugufoba.pdf
    • https://uploads.strikinglycdn.com/files/4e0f04c3-ec2e-449d-a954-b21ed47111d6/10797040378.pdf
    • https://cdn.shopify.com/s/files/1/0502/4029/0996/files/wirigekanizejapep.pdf
    • https://cdn.shopify.com/s/files/1/0497/3166/6072/files/whirlpool_water_heater_installation_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/nokalitotemijixugumijeda.pdf
    • https://cdn.shopify.com/s/files/1/0268/7012/0634/files/forces_and_motion_worksheet_phet.pdf
    • https://s3.amazonaws.com/naxizugenabi/67591986083.pdf
    • https://cdn.shopify.com/s/files/1/0484/3778/8826/files/kyocera_durapro_owners_manual.pdf
    • https://s3.amazonaws.com/mamibis/35610202033.pdf
    • https://uploads.strikinglycdn.com/files/827cb8c6-8896-4073-945f-f04603194bf0/veri_toplama_aralar_gelitirme.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_off00006faa.bin
3097b68dc0f6145924b6529549995429dada31bc5d85254a16ec8dabdc1533ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 5464 bytes
font_01_sfnt_off00008240.bin
c08fb9fbeedb36ea73875e00b6bc45e854a9b9e0d66c426c9971ddfb0d0e6996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8240 10956 bytes

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