Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b1f215ba068f2d…

MALICIOUS

PDF

54.5 KB Created: 2020-08-12 01:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81d115940aec2bffe865a27e1a500d6d SHA-1: 5abb247d99dc8305b60bc246df700e2ed2ecf834 SHA-256: 09b1f215ba068f2d025796b268fdf350fc63428a864ca669a8bb3075c0b9438f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=computer+beep+codes+pdf', indicating the lure. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.cc/pify?keyword=computer+beep+codes+pdf
    • http://xegabon.pthumc.org/uploads/1/3/0/8/130874043/bikej.pdf
    • http://files.cameronbertrandvip.org/uploads/1/3/0/8/130873728/5357599.pdf
    • http://zamofapej.divajaya.com/uploads/1/3/1/1/131164243/2026593.pdf
    • http://xutuwita.sorcerousendeavors.com/uploads/1/3/0/7/130775727/wokolawitelato_kigomazibugopu.pdf
    • http://files.faithloveandrighteousness.com/uploads/1/3/2/8/132814476/vowomep-ruzasedimop-nefowoxikip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/apprendre_l_espagnol_chilien.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/47814529844.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/dayz_minecraft_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/24054229491.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/58834151101.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/tikalosopekumigep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/20413476760.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/xusipebegogikixajenemuvut.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/oxford_advanced_learner_s_dictionary_ninth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/rupusimaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/zogez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/81916011685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/xexirixajafulek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/consumer_behavior_leon_schiffman.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_off00008228.bin
05a32772c13ad0db500d1fbf6ecc5fc6bc53f60cc5a36f29a84284fd53ac1613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8228 5104 bytes
font_01_sfnt_off00009365.bin
66e48cb416b65cf614b349f051d3ab4005855b3e015ddeae0b94e11ce6383c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9365 10188 bytes
font_02_sfnt_off0000b639.bin
c2e39e7cff6bdcd24d75cfb25ab97f9ffc26fb7b96103768481ae7bfffe6d209		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB639 16448 bytes

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