Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22c969186a5b663…

MALICIOUS

PDF

53.3 KB Created: 2020-08-20 20:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f07886266c7b97b2c8b3b96955e2482 SHA-1: 04f4e8e72dce480bdeeeec7d7cfbf2f648590087 SHA-256: f22c969186a5b663e82f57523568845cd9a646f3ca77bfb3c02c8aaaa0fe43db
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=baahubali+1+songs+in+tamil', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Baahubali 1 songs in tamil', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness.

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=baahubali+1+songs+in+tamil
    • http://files.gothicmusicarchive.com/uploads/1/3/0/9/130969974/zabajojekul.pdf
    • http://mavokobun.splchampton.com/uploads/1/3/2/6/132680835/dbbd12a.pdf
    • http://tejawef.wakeupandwritewrw.com/uploads/1/3/1/4/131406390/9910792.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/mulafoxuzoxamipawiteto.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/27960509800.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/tax_audit_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0439/0882/5256/files/buxip.pdf
    • https://cdn.shopify.com/s/files/1/0435/7059/3955/files/v_hits_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/zekux.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/musculo_agonista_y_antagonista.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/malayalam_christmas_songs_2017.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/87161808305.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/ataxia_cerebelosa_sintomas.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_off00008974.bin
125027d6b8018a862221880504b2861b83e48c24db5b00c81a3928f5fe703ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8974 5244 bytes
font_01_sfnt_off00009b21.bin
f2085ab12a8d24c45ca092e7560f0fad7969693064b31db6eb9cbfbd30c554a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B21 13984 bytes