Malicious PDF — malware analysis report

Static analysis result for SHA-256 d745d2637c0fb542…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 21:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ec15d2429fb310d5f3a3807f196f9fc SHA-1: 56ec44211cb68d472449a19bd1c82241352634b1 SHA-256: d745d2637c0fb542a65fe703dfe8981915865e8dbe7e69ad9d1b13bc85ae6bfe
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though partially corrupted, contains text related to 'Maths paper 1 foundation 2019 answers' and a URL that appears to be a lure. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword search to disguise the malicious intent. The file also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm for SEO poisoning.

Heuristics 3

  • 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.
  • 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=maths+paper+1+foundation+2019+answers
    • http://files.gobe-everyday.com/uploads/1/3/2/6/132695596/cd88879e8d.pdf
    • http://files.maximilianlaw.com/uploads/1/3/0/8/130874361/jikawulijek.pdf
    • http://files.franceswatkinsartist.com/uploads/1/3/2/6/132681150/61021a9326.pdf
    • http://bifopisaf.jeanisaacson.com/uploads/1/3/1/3/131380600/sodelupojekanakavo.pdf
    • http://files.jacobjosephpiano.com/uploads/1/3/1/3/131379174/4874819.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/gulapifeg.pdf
    • https://cdn.shopify.com/s/files/1/0443/9700/2918/files/html5_boilerplate_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/viral_pathogenicity.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/netomaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/my_hero_acoustic_tab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/napasexafuxevozijaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/76783215427.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/blessed_assurance_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/saudi_anti_bribery_law.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/24748803182.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/23003956750.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/vunilojugaxopikusod.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/33472632422.pdf
    • https://cdn.shopify.com/s/files/1/0430/8146/6005/files/36485260426.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_off000062fb.bin
759f8fb4d3a4b79c95a1afd66fab94df2841b3aa87fa90e108aad61b887651ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FB 5556 bytes
font_01_sfnt_off000075ef.bin
10e878fa8c9a56483e4f546c9a92c5f93888ec22b2a8af95112b923d3ed3c003
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 10180 bytes
font_02_sfnt_off000098ae.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x98AE 4324 bytes