Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdc6c2316985887…

MALICIOUS

PDF

45.8 KB Created: 2020-08-02 19:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e732c5bc1696f11942da8ecc80eee2e SHA-1: e6974a39c7920d59c449d6dac844d13ece1a187f SHA-256: 6bdc6c23169858873af5909f40134b53f0c69720856a26cdc2211ebf5654b68a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document's content appears to be a lure, possibly related to gaming, to entice users to click on these links. The presence of numerous links suggests an attempt to direct users to external, potentially harmful, websites.

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=super+mario+bros+3+online
    • http://files.jamiemuffett.com/uploads/1/3/1/3/131380107/pumifasid.pdf
    • http://files.galitfriedlander.com/uploads/1/3/1/3/131398406/6005172.pdf
    • http://files.learninglandscapes-frlt.org/uploads/1/3/1/3/131383549/dedofowos.pdf
    • http://files.tracyainsworth.net/uploads/1/3/1/3/131381095/dafipisodazop-poxuw-ziradejivafogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0866/3462/files/94312198923.pdf
    • https://cdn.shopify.com/s/files/1/0435/4700/0983/files/44545176654.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/88338114092.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/veposukosopefujawifitef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/6332887348.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/tijawarapobitida.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/11494541857.pdf
    • https://cdn.shopify.com/s/files/1/0428/9249/2963/files/dudejabowemidozosoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006444.bin
51c6fdbe23035c23cb9f6f0d2248c4763e78648b8db8ac58c264b56dbf23bee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 5176 bytes
font_01_sfnt_off000075a5.bin
283cde29340e17f3678919ef7668aded893940fb776c9e1de990a684fbaef476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 10924 bytes
font_02_sfnt_off00009ab4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB4 4324 bytes

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