Malicious PDF — malware analysis report

Static analysis result for SHA-256 828f6b055fb2512b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 06:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2b412528a7387c8743828e4652b6de1 SHA-1: b66685ff932e683fd16c421615bb26b1fc733329 SHA-256: 828f6b055fb2512b66396d94e780d4841ecd53a08c7b4964b3add853ded58b36
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to 'Spartan trader fx' and numerous URLs, suggesting a link farm or phishing attempt. The ML classifier strongly indicated maliciousness.

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=spartan+trader+fx+pdf
    • http://files.kentvalleyfsc.org/uploads/1/3/0/9/130969592/1003521.pdf
    • http://files.sardiniareview.com/uploads/1/3/2/7/132711999/mirajuvojuvon-xakomopukum-puvirupof.pdf
    • http://files.portfolioinmotion.com/uploads/1/3/0/7/130775583/1845377.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/3791496276.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/98383676015.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/sozevesamepijisowola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/54941012958.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/vavorobipumizofapojiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/mujunodedi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/movosizovibuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/roswell_georgia_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/zunotigamademukimitepob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006260.bin
08e487b89a9ee4d085a48f62a861ea33213d586f3e14d8200301a80447fc32e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 4996 bytes
font_01_sfnt_off00007379.bin
3f1671e6b59a83ec5d5cff049b3d57185970d9bcabf1c79f22b2e3232e897391
pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 15340 bytes