Malicious PDF — malware analysis report

Static analysis result for SHA-256 14aafd29df7da20a…

MALICIOUS

PDF

47.8 KB Created: 2020-08-20 14:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8121e11d4f9917ae2fd4329561d1542 SHA-1: 1e5c0886337596ae531df0b1c55960de9d8f1e27 SHA-256: 14aafd29df7da20acb128567886c1eab925e6ffff592b1be9021db9f87136195
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing attempt, aiming to lure users to malicious sites.

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=bhangra+paa+le+2019+song
    • http://files.thel14.com/uploads/1/3/1/4/131436956/lewazuxotu.pdf
    • http://files.amyandrewsmusic.com/uploads/1/3/0/7/130740483/af97d35e7054386.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/punurazirikexajakekak.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/gagivekanimafuregojopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/mofefitipiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/63499644855.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/mavudanoguxev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7493/files/jedixap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/bacteriologia_y_virologia_veterinaria_merchant_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/navagraha_veda_mantras_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/dekazawageg.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2687/files/fupezebat.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006507.bin
60e3ef39f4254364bd561e69fc6b2e6fe34d2e3395ccd7ce3f51dec1b09ce4c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6507 5612 bytes
font_01_sfnt_off00007813.bin
f5a797d8166af3ee8759ed0f6cebbfb3e70c35b54575353bc935ae6e1a944f95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7813 10796 bytes
font_02_sfnt_off00009d31.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D31 16164 bytes