Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2a58f88e403fc2…

MALICIOUS

PDF

49.0 KB Created: 2020-08-10 14:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20c85df10ca7cd4281f0dfe8a6ba5cd9 SHA-1: 47f0b9bea704f07334c6807017c25c0aba921c25 SHA-256: 9b2a58f88e403fc2f874d6167e7d8bb0bcf06c97e3418d43f32e124d3f6119d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Demande d allocation logement caf pdf', suggesting a lure for a housing benefit application. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination. 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.ru/pify?keyword=demande+d+allocation+logement+caf+pdf
    • http://falod.stephengirardsgirardcollege.com/uploads/1/3/1/6/131637136/zijarodupor-fekomiteju-xikonumizemo.pdf
    • http://files.philipblenkinsop.com/uploads/1/3/1/4/131453485/vagulixobanetaxakuto.pdf
    • http://sowodatuw.bryanallankrauss.com/uploads/1/3/1/3/131379591/dipedim.pdf
    • http://files.mymorethan.com/uploads/1/3/1/1/131163960/6231043.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/86135122358.pdf
    • https://cdn.shopify.com/s/files/1/0429/2876/7143/files/85875601408.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/taduburomusobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/used_car_checklist_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/pzo1135_horror_adventures.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rejem.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/accelerated_c_github.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/barking_up_the_wrong_tree_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/30768312033.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c59.bin
530871f789b2838868272c5f63acc5927eb91a48dc419cafc2b976fd5a84c635
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 4988 bytes
font_01_sfnt_off00007d47.bin
dfb620fb5b5d278062c00337e1ae3e521eea645e04b5a3c044c8fa9d42a65387
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D47 14328 bytes
font_02_sfnt_off0000a924.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA924 4324 bytes