Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2d209eac5a1c9c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 22:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a457d5114c9815a5957d31dd5411fc46 SHA-1: 1f942c2e5aa9df3c654ea4995c39ce153520fc30 SHA-256: 7c2d209eac5a1c9c734022fc5e7e5681c6b559b735b56ae02634955533c1ff83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=how+to+use+a+kobalt+glass+cutter'. While the document body mentions 'How to use a kobalt glass cutter', this appears to be a lure to disguise the malicious intent of redirecting users to potentially harmful sites. The presence of many Shopify links, some flagged as benign and others unknown, suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer 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.ru/wix?keyword=how+to+use+a+kobalt+glass+cutter
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/9100/2279/files/babul_movie_full_hd_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/tajemiliseverevew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/rujuporazimobodoge.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/33065465584.pdf
    • https://static.usrfiles.com/ugd/b8c837_a97515deabf44a8f893645208f2536d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e001332d39b4cd69e54935833f64099.pdf
    • https://static.usrfiles.com/ugd/f3cb45_f4453d3ff56d4e1880e4f2afdd2e3fb3.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/geometric_progression_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/98838717815.pdf
    • https://static.usrfiles.com/ugd/b8c837_d843a90750ae4650b03735ca80350297.pdf
    • https://static.usrfiles.com/ugd/b8c837_9de39514f661457f85d44fcf7b7d49b6.pdf
    • https://static.usrfiles.com/ugd/dd4472_94e7b2860d94440c9b6bd3148b9b59be.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_off00006250.bin
8f5070b2e021a96f74802433b48980af3214ee1503b7c93a6713c38488bfa9c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 5224 bytes
font_01_sfnt_off00007438.bin
fb7ba4303f8c6ef88406f01df5f618761fa10d469ca4cd6381409701d4b4e423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7438 10120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.