Malicious PDF — malware analysis report

Static analysis result for SHA-256 8809e689faa7809e…

MALICIOUS

PDF

40.9 KB Created: 2020-09-20 20:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e12584d5ca7ad7efbb91b0e40054577e SHA-1: 6f7052003c9fc9c685d7d0343df0c782db03331e SHA-256: 8809e689faa7809e7f83d8f37232e74278ac01d593067872794899ebbc1fd7c7
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URLs suggest an attempt to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classifier output strongly indicate malicious intent, likely related to phishing or malware distribution.

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.me/wix?keyword=the+fifth+season+pdf
    • http://gedew.thegamblingclinic.ie/uploads/1/3/1/8/131856801/rabamefenebuleb.pdf
    • http://files.expressfullhealthpotential.com/uploads/1/3/0/7/130739456/balarobajuvarivegi.pdf
    • http://files.shireinuchoirli.org/uploads/1/3/0/7/130739776/neteluk.pdf
    • http://satin.ryanmurrayconductor.com/uploads/1/3/1/8/131871921/pujamenisobugoz.pdf
    • http://wogegeg.996revolution.com/uploads/1/3/0/7/130776407/9095107.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d6d89bd2-919a-462c-a6ed-af049e3130c7.filesusr.com/ugd/87b9a8_6d16cadd29c94027aa184b0c473c7072.pdf?index=true
    • https://5799056a-a74e-4355-b521-52232e12f65c.filesusr.com/ugd/cd81e9_649d6f44f8dc4de4aee8aea00b8a000f.pdf?index=true
    • https://b5a4cf0a-4473-447c-a149-5ae5628967f2.filesusr.com/ugd/1e4819_826e9de9ca51419daa81443ab3e76578.pdf?index=true
    • https://b7227182-188e-4d8a-955c-761c9881c123.filesusr.com/ugd/99965f_a7924398fd6c403d9288a86f229f5e48.pdf?index=true
    • https://fca5c216-8886-49d8-b3dd-ade178925d43.filesusr.com/ugd/f84671_1e49c8fdc6204b16871f2c50250eea73.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/9177/7952/files/balanced_scorecard_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/bazaar_movie_saif_ali_khan.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/ct_wrestling_results.pdf
    • https://cdn.shopify.com/s/files/1/0459/8824/9757/files/armitron_pro_sport_watch_wr330ft_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/maleturatemudalunilo.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_off000062a8.bin
13ee591e8ad32b4f5073cac5687860073240c7ff84e1dd6b5c2580f3e5483f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 4952 bytes
font_01_sfnt_off00007380.bin
85405d41bc0d0d50d4374772d5f9e3b4132407d6b3201f0e42362d64bdb072ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 10464 bytes

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