Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dadd5dc824d9e1…

MALICIOUS

PDF

41.8 KB Created: 2020-08-17 05:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4b6bb2b0e51d034624d83995ac3a68a SHA-1: bd5e354b8c6ca2dbdc2ad508ef7567e2229bc5b8 SHA-256: e0dadd5dc824d9e1a1d7a3c4c402709e17b65fc8d300c073cfac146352970d20
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's primary purpose is to lure users to this redirector. No scripts were extracted, but the PDF structure and embedded links are sufficient indicators 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.ru/pify?keyword=sample+latex+code+for+report
    • http://losavov.dreamdesignsofficial.com/uploads/1/3/0/7/130738732/3023008.pdf
    • http://files.chanble.com/uploads/1/3/1/8/131856409/sujaj.pdf
    • http://files.sohappytolearn.com/uploads/1/3/1/4/131406800/nonexuna_lukupumapowezi_lasifiz_rulivegina.pdf
    • http://files.linguamusicatours.com/uploads/1/3/0/7/130775853/ganomupam.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/wurazibepalatumegubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/zaviwulovexadalozunixofeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/9602/0894/files/53545467324.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/4723187798.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/76748965835.pdf
    • https://cdn.shopify.com/s/files/1/0436/7797/4678/files/10940736039.pdf
    • https://cdn.shopify.com/s/files/1/0447/4952/1045/files/biology_cornell_notes_cycles_of_matter_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/niligak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/rage_card_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/tajeligigiselemej.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_off00006333.bin
5e0b2301f44391646490ce57c9a7975e7a22591339e8021f18b8961dfdc137b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 5292 bytes
font_01_sfnt_off0000751e.bin
5a1cb8002c75f7c1622d89af228c1e823720841bb2b8dbb9c741c778511733e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 10984 bytes