Malicious PDF — malware analysis report

Static analysis result for SHA-256 855422c652259b5b…

MALICIOUS

PDF

52.8 KB Created: 2020-08-07 09:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0361489870141691386a02d7b984366f SHA-1: a066c755694f8a6494a36ee4d477ec1ae3be654b SHA-256: 855422c652259b5bec18f4d921906b5d7c4b0335f5321e2ef2c1996b79f1f428
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches this finding. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=surah+naba+arabic+text+pdf
    • http://files.blymountain.com/uploads/1/3/2/6/132695476/5491009.pdf
    • http://files.bodyworkharmonics.com/uploads/1/3/1/3/131398221/tosomele.pdf
    • http://kinojojo.bergbows.net/uploads/1/3/0/8/130874218/gerusix-kuxupuvilokeb-bosuxopaz.pdf
    • http://files.philthyturtle.com/uploads/1/3/1/4/131453268/misoj_nizavazo_laleju.pdf
    • http://files.drnathangrebe.com/uploads/1/3/2/6/132682790/ligutawof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/wigojovolegasonowazadimer.pdf
    • https://cdn.shopify.com/s/files/1/0435/3386/1018/files/pathology_mcq_robbins.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/jamivukosonoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/korugiperorimufomiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/54556204497.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/koturimirev.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/kowotor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/papuzepebunarafugivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/33524159548.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/xafekuxuzawo.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_off00007060.bin
95a260d9903ed17c2b46f433302cb55866f60d866f0c271d489b02f42c07a6da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7060 5344 bytes
font_01_sfnt_off00008288.bin
572637e871da385156587d548d8cdee228ad0c8ea698baf7791dada39c96759a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8288 10336 bytes
font_02_sfnt_off0000a5c4.bin
e39d745ad708c4061a645fe6a51d624ebd6b292e8b3ece48249ef69aa686c585		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C4 19600 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.