Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d02bc522c7d6218…

MALICIOUS

PDF

39.1 KB Created: 2020-08-05 06:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e763936b22e43d7ae837360bf80374e SHA-1: 7a8e598f47ae4b0d814fb3a2b2b2b23086b50a63 SHA-256: 4d02bc522c7d6218a9fda129160d9cc9e3f4b6d393b20896ba214f1197008f77
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with one pointing to a known malicious redirector (ttraff.com). This redirector likely leads to a phishing page or a malware download. The PDF also exhibits characteristics of a link farm, with numerous links to other PDFs hosted on various domains, including shopify.com and several potentially malicious domains. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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.com/pify?keyword=adeste+fideles+spartito+organo+pdf
    • http://pedigi.exoticfashion.online/uploads/1/3/1/4/131406149/2491093.pdf
    • http://files.nileshagemann.com/uploads/1/3/1/4/131407247/lumemekigikev-mozuveta.pdf
    • http://files.appletreeforgewv.com/uploads/1/3/0/7/130775998/378ecd4c33.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/79078443113.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/movofarova.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/tuvedoforazekedijipikino.pdf
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/jazefuriwakovezamajepo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/autonomous_vehicle_system_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/aptitude_test_questions_and_answers_with_solutions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/nosedosibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/53688475384.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7592/files/12th_biology_imp_question.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005962.bin
afee6a24c8b4e2d51b65faff27f355e32e4f7abae770c4cd9788a1a4ca05fbb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5962 5200 bytes
font_01_sfnt_off00006b23.bin
241ddf17b11a875b6daf8d077f078f191df6d386c3cc534fca9c1f17ca879cd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 11216 bytes