Malicious PDF — malware analysis report

Static analysis result for SHA-256 61448de1a8e23ccc…

MALICIOUS

PDF

71.1 KB Created: 2020-08-03 09:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 927c08c5530c96a44a64084d2f8f36c8 SHA-1: 3839163a5f537c27bc37fa78e7935a488199d4bf SHA-256: 61448de1a8e23cccd5412c0cf7467a96cc65f8acb8755c0226172829e8289c63
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'ttraff.ru'. Another heuristic flags it as a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious files. The ML classifier strongly supports the malicious nature of this PDF.

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=discord+mod+bot+copy+and+paste
    • http://files.shineeventdesign.com/uploads/1/3/2/6/132695273/9822435.pdf
    • http://files.allofficefurnitureltd.com/uploads/1/3/1/4/131438464/2867456.pdf
    • http://files.rugaruejerky.com/uploads/1/3/1/3/131383959/pegisegejadexobuxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/22944360331.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/nobofatilisosubived.pdf
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/aarp_games_solitaire.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/52279127097.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/makupefabesuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/22460220771.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/49931335352.pdf
    • https://cdn.shopify.com/s/files/1/0440/7014/2117/files/29998722388.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/2584536090.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/28306494397.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c474.bin
62b8c61f437587397d57e424383e94460729234c39d02e5f6c7e75aa9536b938
pdf-font-stream PDF embedded font (sfnt) at offset 0xC474 5428 bytes
font_01_sfnt_off0000d6cc.bin
8faaa159215836f5498d61edea98657adaf17d42576c97c50cb69a6c0b4c144e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 3488 bytes
font_02_sfnt_off0000e4f1.bin
183ad4b117584836bf79313adc4b245125bd67cc8ade2865b3743e700a115f21
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 13216 bytes