Malicious PDF — malware analysis report

Static analysis result for SHA-256 7586d00f3a56d1c5…

MALICIOUS

PDF

64.4 KB Created: 2020-08-04 05:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffcf20c3f73da3428a14f97e5139acdf SHA-1: f8c1cf638a924fec14c3de905063713f86c2af93 SHA-256: 7586d00f3a56d1c529004595e7339c7d090b385e3e55790687e97026b69008ab
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary link identified, 'https://ttraff.com/pify?keyword=bhagavad+gita+pdf+gujarati', suggests a lure to download a PDF, likely to facilitate further malicious activity. The ML classifier strongly indicates maliciousness, and the presence of numerous links points towards a link farm or redirection scheme.

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=bhagavad+gita+pdf+gujarati
    • http://files.kyledavi.com/uploads/1/3/0/7/130775639/fetejumak_kogotojedilera_depotavoded.pdf
    • http://files.csbwest.com/uploads/1/3/1/8/131857112/9ea70eadb.pdf
    • http://files.lsja.org/uploads/1/3/0/7/130776445/0ca6ac40d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/dofonedixuvidalavedanigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/gozexemagogejelulipokewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/1634542998.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/sukamirewusiveveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/watch_avengers_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/briggs_and_stratton_5hp_outboard.pdf
    • https://cdn.shopify.com/s/files/1/0435/6082/9087/files/dmv_nj_practice_test_500_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/lawojumobabojuwi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3096/8480/files/dategufakorijas.pdf
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/major_organs_of_the_human_body_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/pasajizebewodunofo.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/tajuxagelo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095ff.bin
e2721a46a62361f24e03e4b50310a36519d8864c7e6664c108f569ee65d020b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FF 4824 bytes
font_01_sfnt_off0000a686.bin
243267824ee7791a087fad24a3eb09c1e3c1bc8964072dd73c2b5037a1cb95bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA686 13356 bytes
font_02_sfnt_off0000d107.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 16204 bytes
font_03_sfnt_off0000e637.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 4324 bytes

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