Malicious PDF — malware analysis report

Static analysis result for SHA-256 267fa6f450d7fa79…

MALICIOUS

PDF

37.1 KB Created: 2020-08-04 19:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee211fe74fdeb49593a6fca9ab58b395 SHA-1: 57936775aa0284a89691d2c4dd724724c2aad8ff SHA-256: 267fa6f450d7fa793532d1c7fd21095dad0a088349ef384b33ac8f7c5e5b50f8
152 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is https://ttraff.com/pify?keyword=benim+hocam+video+ders+notlari+pdf, which is likely used to obscure the final destination of the attack. The document body contains garbled text, but the presence of the malicious URL and the link farm heuristic strongly suggest a phishing or redirection attack.

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.com/pify?keyword=benim+hocam+video+ders+notlari+pdf
    • http://files.angelicastrologymagic.com/uploads/1/3/0/7/130775953/nugumafafojuso.pdf
    • http://files.hanmaumchurchdfw.com/uploads/1/3/2/6/132696330/kuwoburub-wobeganeb-wisajoromivat-takotokosi.pdf
    • http://files.gracetabernacleva.org/uploads/1/3/2/6/132683165/884738.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/41989089026.pdf
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/dc_cable_size_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8402105605.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7577/files/roll20_macro_templates.pdf
    • https://cdn.shopify.com/s/files/1/0430/2598/9785/files/lisalagapem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5032/files/gopopimegunuzago.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/64999658707.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/28803988050.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/53664533729.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/padisenifekerurupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/1990083204.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_off00004ec9.bin
bf3f75a07b860d26df27ac93250cebdce8bbaff095c0859991a86a2a096298d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC9 5504 bytes
font_01_sfnt_off0000615e.bin
48106b603c1accdc1d4e79b536d514acdce6312e758f5e2a7400a4b8adc8487a
pdf-font-stream PDF embedded font (sfnt) at offset 0x615E 11716 bytes