Malicious PDF — malware analysis report

Static analysis result for SHA-256 8497df307faf73af…

MALICIOUS

PDF

34.3 KB Created: 2020-08-21 21:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7812b7b81dd5cfa199b0c361f99261d7 SHA-1: a3c9805a7920cdf864a56c4e62274a3ee929b00d SHA-256: 8497df307faf73af82e26dc5bb0269544a726129a30c7a48273eb275f03e9a59
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains, suggesting a link farm or content hosting strategy. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=boomboxx+i+dey+mp4'. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, further supporting a malicious intent, likely related to traffic redirection or hosting malicious content.

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=boomboxx+i+dey+mp4
    • http://files.ps172.org/uploads/1/3/1/4/131452942/6529903.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/hypersonic_airbreathing_propulsion_heiser.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/cinderella_and_the_four_knights_songs.pdf
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/assembling_computer_parts.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/zubiwabapek.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/annex_14_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/58385894794.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/carols_for_choirs_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/7735/2089/files/67545217742.pdf
    • https://cdn.shopify.com/s/files/1/0433/2653/7883/files/instagram_no_modo_noturno_android.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ac.bin
9562509dbe16bb40a1c14222e45010f81dd2063b415b4a7581070a44b0b534dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x47AC 5036 bytes
font_01_sfnt_off000058d2.bin
9c652965bfc7d3a6af2f9fab3a6d01dbadd8fae0d9929adbf146eb555220d530
pdf-font-stream PDF embedded font (sfnt) at offset 0x58D2 10620 bytes