Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2992b884639c8d…

MALICIOUS

PDF

65.6 KB Created: 2020-08-12 07:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83d3408685afdf8258ce0d5a9de03415 SHA-1: 4e20959aa3d874a4c25f6cac6092ab741355127f SHA-256: 0d2992b884639c8d1edf61176623355c763826d37eaed258cb67ab96cf25fbff
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'emotional intelligence appraisal pdf' and a URL that appears to be a lure. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, likely to drive traffic to malicious sites.

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=emotional+intelligence+appraisal+pdf
    • http://files.emmareavesphotography.com/uploads/1/3/2/7/132740435/5930381.pdf
    • http://mobesivel.philadelphiadancecenter.com/uploads/1/3/1/3/131398560/c71ae.pdf
    • http://files.nikolephoto.com/uploads/1/3/0/9/130969220/12929bdcb3dc2.pdf
    • http://files.lfhdigital.com/uploads/1/3/1/4/131454523/rorawifawo_patajuga_nebinit.pdf
    • http://muziki.jonahshue.com/uploads/1/3/0/8/130813366/sivexewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/36495124654.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/wizuruvavemobuwoveninit.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/41451941348.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/fotapusuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/4971472244.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/balanced_scorecard_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/dungeons_and_dragons_5th_edition_character_sheet_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/sowuwumobud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0935/files/4769073951.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/bonaxaranewoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/73317185972.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_off0000c2ed.bin
f768248e02b11ee65d6f6cd90835f7f13b97ca3d8c4ecad96ec4de453fac3b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2ED 5432 bytes
font_01_sfnt_off0000d549.bin
a5798949b5c90e7b16145c7624dceb371ebe7adeee4259647e88bb0199b8d52e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 10532 bytes

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