Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae799191cad847d…

MALICIOUS

PDF

62.1 KB Created: 2020-11-02 06:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba35f62ed18b292177451931ce4944f3 SHA-1: 9197e12fe90951222b00bc5f86d9cef1905fb903 SHA-256: 7ae799191cad847d27a3ca542427e89ed5cde304b3be15880d429cfa9bf5a22c
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body also contains a URL that points to a malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the presence of malicious links is a strong indicator of 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=berkeley+stanford+game
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8b5a2e966b7.pdf
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/9938299.pdf
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/c0d8c11de0c2.pdf
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f874012d2fd5.pdf
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8ceaf12c6d9.pdf
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5f9b41b10c34f.pdf
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f90b30fc5b8d.pdf
    • https://cdn-cms.f-static.net/uploads/4388839/normal_5f9003c104790.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lorifawuvawot/saxitati.pdf
    • https://s3.amazonaws.com/zabevog/three_houses_dlc_gift_guide.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/felker_tm_75_tile_saw_parts.pdf
    • https://s3.amazonaws.com/mejifavo/bexikiveva.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/aptitude_questions_and_answers_with_explanation_for_tnpsc.pdf
    • https://s3.amazonaws.com/zukukelejurotef/xilesed.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_off0000b231.bin
c46b985c739ab2d1aceec315dde65d3ab8ae9d8a7342210b8d3f864483831f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB231 5444 bytes
font_01_sfnt_off0000c4b1.bin
c0bb6bbacbd69824b028b633d4ea400d376461d2104b743e1691ffd18ea9c08f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B1 11656 bytes