Malicious PDF — malware analysis report

Static analysis result for SHA-256 08abba5c89611444…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 05:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304c29d81fdb0329d84312090c6e1a23 SHA-1: f84aa3c2cf54c0e831eb0ce40dbc79e364f53150 SHA-256: 08abba5c896114445a16072eeb9e64d4dcb9571dfd275376ffbf1c323deccc75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same redirector URL and references 'access database templates free', suggesting a lure to a malicious site. The ML classifier 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=access+database+templates+free
    • http://files.cardinalfastener.com/uploads/1/3/1/6/131606155/1833126.pdf
    • http://files.splendorabandboosters.com/uploads/1/3/0/7/130775518/karasalilebi.pdf
    • http://files.minisheepadoodlepuppies.com/uploads/1/3/1/6/131606128/fba569a5101b9c.pdf
    • http://vezesi.helpinghandsrescue.org/uploads/1/3/2/8/132815806/dizaku_webeto_dimokekipune_tones.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/piwutuzomabunapotexelol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6441/6661/files/debutumilevewaxutiwam.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/bikifitigigusasusojugotor.pdf
    • https://cdn.shopify.com/s/files/1/0439/1125/0075/files/73752670282.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/wiguvakulomizusokufisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/30c_to_fahrenheit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2593/files/kumitozivirubileb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/bupewefulezegol.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/dinisuwunedibuv.pdf
    • https://cdn.shopify.com/s/files/1/0464/9805/4312/files/62302669169.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a1.bin
764c2d1efeb748bd2c4890e4f865f698f76b56ce9d3bd031d63918b9065ec913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A1 5432 bytes
font_01_sfnt_off000076f2.bin
4bfe3e4ac4a57b21e48a11eeaa975f27951d74dbda7ce42375cf96ecd1b78377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 10180 bytes

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