Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0b09bd728be1ac…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 20:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cdeda21f4451f774ebe58639f5a5b5f SHA-1: f78fc3c91cd33965ca8beedcce05189b0d5198ba SHA-256: 5f0b09bd728be1accacd8fa3694a66c573a61e7e75d95974993cf90cdde4327c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO link farms and a known malicious redirector. The document body, though partially garbled, includes text related to 'Politique budgétaire définition pdf' and references wkhtmltopdf, suggesting a lure to disguise malicious links. The presence of numerous external PDF links, including one to a malicious redirector at traff.com, indicates an attempt to direct users to potentially harmful 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=politique+budg%25C3%25A9taire+d%25C3%25A9finition+pdf
    • http://files.rxmassagetherapy.com/uploads/1/3/1/3/131380493/1a956c360bc5a.pdf
    • http://files.muskogeecountygenealogicalsociety.org/uploads/1/3/1/0/131070561/039e5a9.pdf
    • http://files.mattcameron949.com/uploads/1/3/1/8/131858592/797692.pdf
    • http://files.tohsgirlsvolleyball.org/uploads/1/3/1/4/131437157/jogerumukoginadid.pdf
    • http://fedapove.jnfr-w.com/uploads/1/3/0/7/130776716/wojawidelono.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/concept_of_balanced_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/74497923665.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/30796611073.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/5e_winged_tiefling.pdf
    • https://cdn.shopify.com/s/files/1/0438/2379/2285/files/bozulawas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wonukuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/fapapafiliwigipomedagivu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1212/6882/files/12109268831.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/logistics_operations_supply_chain_management_and_sustainability.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/lawopegoje.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_off000062aa.bin
e4758970626998b625b1d17306154dab2c0c5f9e70f5c815825f8b427ace99ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 5440 bytes
font_01_sfnt_off000074e4.bin
773c18884618bb057b26cd6faf1d528eca6e15102874be68b9546728aa90b55d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 11428 bytes

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