Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f1dae54bb352e0…

MALICIOUS

PDF

43.1 KB Created: 2020-08-18 14:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af8371e1a9586b86feaee238bf213b74 SHA-1: 21707cd39609a592abf08db775c2b79863905226 SHA-256: f7f1dae54bb352e03255db9df92445f0543c68434c7d7cf2d7b3e31301404dd1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a piano sheet music download. The document body, though heavily obfuscated, contains the target URL and references to piano sheet music. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bittersweet+symphony+piano+sheet+pdf
    • http://files.kingfisherpbs.org/uploads/1/3/1/1/131164273/dirakaxet-gezodirivemikix-jozoja.pdf
    • http://files.kellysternyoga.com/uploads/1/3/1/6/131607522/2094288.pdf
    • http://files.photography-timeless.com/uploads/1/3/0/7/130775806/jijijufuwuxub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/93073770757.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/bomedaxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/27981214816.pdf
    • https://cdn.shopify.com/s/files/1/0447/5109/3914/files/update_xbox_one_controller.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/zuxovujonubaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/71941714649.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/6944069577.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/alice_in_wonderland_mad_tea_party.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/pawuzus.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/ziposijekeba.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/31743089740.pdf
    • https://cdn.shopify.com/s/files/1/0428/8600/4899/files/8369884067.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_off00005863.bin
180ab2d45a569ff6d567e01d730bb96b370c9f37112cd378d379af0d81608be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5863 5492 bytes
font_01_sfnt_off00006afd.bin
a4311889aa0b0fcc0e0280154cdbc3af659b11ef25b2299d6b5fa3a223748143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFD 16044 bytes

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