Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1003aff662e0115…

MALICIOUS

PDF

40.2 KB Created: 2020-11-05 22:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41ed0ce42a582545a1054dcc03a9683 SHA-1: 78e194016ef6cbd6679674bb477aafd796ce6cd4 SHA-256: a1003aff662e011595e47069ca04f7771fb12a3b0f7c527465ed6ac5deb3a9a3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, contains a URL that matches the malicious redirector, suggesting a phishing or redirection attempt. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic, likely to drive traffic to malicious sites.

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://ggtraff.ru/123?keyword=euro+pro+x+toaster+oven+manual
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/6543692.pdf
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f8e8d7de7273.pdf
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8a8e5044ae7.pdf
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/431967b989f5.pdf
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/banobozuzelalodu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2fb03a53-ce1a-4f06-952d-ec7674b613b2/69071178991.pdf
    • https://uploads.strikinglycdn.com/files/0cbcac2e-495d-4351-a2ad-11a31252ab7e/nogixenibajadalu.pdf
    • https://uploads.strikinglycdn.com/files/68643718-888f-4220-b890-21f0996a01e5/nyc_public_school_calendar_2015.pdf
    • https://uploads.strikinglycdn.com/files/59d6f38c-f08e-40cd-8ec3-dfd5871894b7/loremadivobidewimisaxor.pdf
    • https://s3.amazonaws.com/naramuro/pokemon_go_new_update_download_apk.pdf
    • https://uploads.strikinglycdn.com/files/f704124d-ac7f-45c9-9a01-8896c2ce920b/fagodasa.pdf
    • https://uploads.strikinglycdn.com/files/78a75809-e4ee-4bd4-9c55-5bae8cd0999b/51104278362.pdf
    • https://uploads.strikinglycdn.com/files/a63f2cf6-dbd4-4131-9dcd-a6e7e3d03ec4/pemi_baker_family_dental_plymouth_nh.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_off00005fea.bin
a8e250667fea05d7e8c5fb05887125bd24f03a4ca408881d3c72363cbf43fff4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEA 5052 bytes
font_01_sfnt_off0000710a.bin
bee7bb768fc69d4c315e0b489ce8451fdf71b8ff99f00785fbd66dab1394000b
pdf-font-stream PDF embedded font (sfnt) at offset 0x710A 10392 bytes