Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29923ad8f7c1d27…

MALICIOUS

PDF

76.9 KB Created: 2020-12-27 07:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d9df3a46c97d008e1be8bb363b59879b SHA-1: 741f89fd4c2a5b078aab926defcb0887153b120b SHA-256: d29923ad8f7c1d274c813fac778d0a0422713ba224ce2a9abfe8138b13c97aa5
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary malicious URL identified is 'https://traffine.ru/wb?keyword=groupon%20merchant%20center%20france', which is likely used to lure victims with a Groupon-related keyword.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/wb?keyword=groupon%20merchant%20center%20france In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5fe6901b9efba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_5fd63eb9da92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f99f9c77a469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5fad2fac5856e.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/funim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99033ea4-d393-42aa-9152-e98bb56d13c2/35141073542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e2a37e-11a9-4142-87e4-5fbdb14afd08/85481795092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d566941-69f6-4f7d-b3c8-2bd43acb5593/15666970280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b6bd7d-6409-470e-aed4-0eb74dd15b90/power_plant_engineering_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e7d9f6-da9c-4dc3-890f-0ebb763c68dc/do_you_want_to_play_with_my_balls_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e46e156-69d8-4603-aec1-e5c79a015ba0/hp_15_ay011nr_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ec2ebe-c0af-4748-80d6-a52f597bcc63/dezofonuvobaxepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcfbdbf-0dc7-4514-9e55-635c1e814c54/tobijelu.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_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 5076 bytes
SHA-256: b0a527326d5e2aa610b79b930b9b6a4712d76c80fac43dfe9102b47dca17e925
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 11444 bytes
SHA-256: 87343d9ceb208d214a0e1d90a8372b9ac17b5f0516373e71856b30c68b9a8427

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