Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d67ea7d395429eb…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 06:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b28a2903cf25aa9812a433e283122d2 SHA-1: 6c0b33b32c31a6877bd921b0f8d3f79327e27b1b SHA-256: 5d67ea7d395429ebcd8fbc1937ade16c60eb33abf34023852fa174e25f1c1bce
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and text that attempts to trick the user into believing they are downloading music, while actually directing them to a malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed for SEO manipulation to distribute malware.

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.ru/pify?keyword=gorillaz+demon+days+download
    • http://files.texasdispro.com/uploads/1/3/0/8/130874526/17c27b0b5.pdf
    • http://files.painismyguru.com/uploads/1/3/2/6/132696598/8700029.pdf
    • http://files.porchlightapothecary.net/uploads/1/3/1/6/131606465/1b040d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/mowolusapefotojuwikov.pdf
    • https://cdn.shopify.com/s/files/1/0429/3607/4396/files/53192435380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/49005790245.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/vexux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/80543261163.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/72031916581.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/busezaxusitujibogod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/american_institute_of_steel_construction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4250/3832/files/vovefolap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/pandas_to_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/valotipodagibojov.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/80902633538.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/zaluxiremetozew.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_off00006760.bin
5d60e3c70f87089ec8c94c287147e4b378a5be489b39ad34cfddbfb7bdf19031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6760 5244 bytes
font_01_sfnt_off0000793d.bin
d73630274e4631189b4b37e3f2f30762c2d51de65560753599ff41800fe2b850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 10224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.