Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea217a860996929…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 15:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4136c424dad9a10e4e9acd02536f671 SHA-1: e876b42531abf87020f8c5745fe0843447b70154 SHA-256: 7ea217a860996929b6081337d0beff4373f6c16d6fc800d455dc04029118cd1e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, includes this URL and appears to be a lure for a 'blouse designs catalog pdf'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=blouse+designs+catalog+pdf
    • http://files.briannedonaldson.com/uploads/1/3/0/7/130775837/zojibexavaguv-baluxepi-fawepejotana.pdf
    • http://files.gloriousseaglass.com/uploads/1/3/0/9/130969966/xokemolixilazuneluka.pdf
    • http://molezat.kelseyshapira.com/uploads/1/3/1/6/131606758/7204873.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/21921292312.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/profecia_celestina_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2411/files/disomaxaduvuzoliz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/adorn_miguel_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4069/files/wedding_photography_poses_bride_and_groom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/56018163594.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/darapazetuzupobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/blindspot_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/bikixuzawitigub.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/dapedixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/73481401154.pdf
    • https://cdn.shopify.com/s/files/1/0439/1341/2760/files/tesulenexasofimilixota.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/lexezazagud.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/46086876875.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_off0000686f.bin
d6f36f04e13208b2f925a953f972b061f2e16e4e73f3d5a671c80667fe25275e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686F 5276 bytes
font_01_sfnt_off00007a84.bin
180abfefa423ea0e54b83566b55280b006903cd2c3854c1e74fb20cc1db5ffa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 9656 bytes

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