Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a282a81dcbe4fde…

MALICIOUS

PDF

38.3 KB Created: 2020-09-05 17:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d200f993abff4c4283f5de9c916688 SHA-1: 1b248357d8d01ebc9fd73e64a861a721ab1928f0 SHA-256: 6a282a81dcbe4fdeac493526044b1df97fb5a8af16b5e04393e4ed8cc82ba8ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=beautiful+nature+flowers+images', which is flagged as malicious. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute 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.me/wix?keyword=beautiful+nature+flowers+images
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/tovopevagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6744/files/28142210824.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/ge_25006_4-device_universal_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/ralekifenavelakefatuwaro.pdf
    • https://static.usrfiles.com/ugd/ba3095_0c84d0b27d104bfab938eb873f72f475.pdf
    • https://static.usrfiles.com/ugd/b8c837_2546e85eae2d40c8a25f2d926e4e069b.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_07b7bf40ff904dd3b9f9e60297a4df75.pdf
    • https://static.usrfiles.com/ugd/05301a_325c5fb98a7d4bcda59e07b9091ee08d.pdf
    • https://static.usrfiles.com/ugd/d7c203_420ae59d61d142d5a42be002f13cd3d3.pdf
    • https://static.usrfiles.com/ugd/912de2_53e430bcb4a24e3cb484c6f5eef716c4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fenajowogotuxukat.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/18611727212.pdf
    • https://cdn.shopify.com/s/files/1/0439/1642/7419/files/burger_and_lobster_nyc_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/31272891895.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/communication_journal_articles.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_off0000580d.bin
454a037520a6060f8614bbda1646d85ab8b5d9f0311f425e5cdee01165d72e9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x580D 5228 bytes
font_01_sfnt_off000069da.bin
1f6e10e2a71d4643f2920571564c6fc30c2ecce4d0d83a3200a3427e256162c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 10128 bytes