Malicious PDF — malware analysis report

Static analysis result for SHA-256 3598c8ba2d10b9a1…

MALICIOUS

PDF

41.0 KB Created: 2020-11-06 03:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7680e7d96fbb6aae670d1bc3068daa55 SHA-1: 8805262cad67335cb719ec4d753a65788d9ef0f6 SHA-256: 3598c8ba2d10b9a173b04311eccbf49e330112fbed82ae8f2c80b107612f3fab
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a significant heuristic firing indicating a link farm designed to manipulate search engine results. One of the embedded URLs, 'https://traffset.ru/aws?keyword=free+printable+pinewood+derby+templates', is directly associated with this behavior. While no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest an attempt to redirect users to potentially malicious sites, possibly for SEO poisoning or to serve further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=free+printable+pinewood+derby+templates PDF link annotation
    • https://jijutuvexezepor.weebly.com/uploads/1/3/4/4/134444828/aacb657.pdfIn PDF document text
    • https://zumegarilafexiz.weebly.com/uploads/1/3/4/0/134096691/6767043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/48920810897.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/sutaxujiramamose.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/shes_a_homewrecker.com_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/sogezidevigodi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/1635380314.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/45599427670.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/5048916094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3766c689-400d-460e-8dff-d018b0e10e07/microeconomics_hubbard_6th_edition_p.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/farmers_market_pinellas_county.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/sexuality_today_gary_kelly_11th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/94746372049.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 5396 bytes
SHA-256: 0b96464180bc135cd3ddb1dd46af6eb7ff1bce7ab3b49d8b792148ca2ef9ff32
font_01_sfnt_off00007432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7432 9676 bytes
SHA-256: cb08ed1f52bb55c6949ad0377ede621016660c25c1d63b05b23b1cfc1d8d39bf