Malicious PDF — malware analysis report

Static analysis result for SHA-256 85edd802b47d6ab5…

MALICIOUS

PDF

71.3 KB Created: 2020-08-11 03:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6277957e541f83c51b8003acd6115a27 SHA-1: 531634f1b3054a5def1f11c8d552a106047f0fa4 SHA-256: 85edd802b47d6ab5fbc257272219062645ad239028e256f18d8225ad59d4bf94
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Bhagavad gita slokas in telugu pdf'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the link farm suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=bhagavad+gita+slokas+in+telugu+pdf
    • http://xesunava.raniyoungdesign.com/uploads/1/3/0/8/130874254/beccbbf04de7.pdf
    • http://files.pernsfood.com/uploads/1/3/0/8/130873741/xofumafajozu-dopuripuxote-pimadiroz-vagolebapojukok.pdf
    • http://files.drmrosenfeld.com/uploads/1/3/1/4/131408204/c1bacfd92fb910.pdf
    • http://files.edhiresolutions.com/uploads/1/3/2/6/132681611/furivafukiwuz.pdf
    • http://files.jcswainenterprise.com/uploads/1/3/2/6/132682585/bitebozeb_vakujajegozux_nefikeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/jameson_capitalismo_tardio.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/21157541400.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/89719867545.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/nimupometivuvefutibuxutop.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/25748554490.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/61243531260.pdf
    • https://cdn.shopify.com/s/files/1/0451/1475/3189/files/catchment_area_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/jedi_mind_trick_gif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/10104683224.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/xofito.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/dark_souls_2_titanite_shard.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/agregados_petreos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.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_off0000cbf7.bin
c020472cff42873354fbb1819e987bae6b872911ae3f0fea4a714846db4262cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF7 5380 bytes
font_01_sfnt_off0000de50.bin
7430a9c7f9c3e1084d5f24e060b126c95ad0bad1ddf82709d7521757b5d5c834		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE50 15936 bytes

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