Malicious PDF — malware analysis report

Static analysis result for SHA-256 e853878b374dcccc…

MALICIOUS

PDF

59.7 KB Created: 2020-09-06 01:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a28d05b542bd0e40aa2127f4dbaf847 SHA-1: 4d46cfe40ae9f5e08298243fc552a3245f6b81a7 SHA-256: e853878b374dcccc05f97c85b03d1685494b59152626387f15f0388207bb2937
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a high density of embedded links. One critical heuristic identified a PDF redirector link pointing to 'ttraff.club', which is known malicious infrastructure. Another heuristic indicates a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to obscure the final malicious destination. The document body contains obfuscated text and the malicious URL.

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.club/wix?keyword=bangos+ilgis+formule
    • https://cdn.shopify.com/s/files/1/0439/4899/8811/files/dvdfab_blu-_ray_ripper.pdf
    • https://cdn.shopify.com/s/files/1/0454/2958/8124/files/apush_chapter_4_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/mivutotagobetugiwokuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/minecraft_enchantments_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/43071028926.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/40438107679.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/kogowakogos.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/63391548213.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/99510381586.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ca1c2afb596450cbdb5b57d07161ad8.pdf
    • https://static.usrfiles.com/ugd/234f58_e5cb2cca08e34bd0a0e12e62bba9e48d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c43ab42b40f4f7a892d247be19dfa8a.pdf
    • https://static.usrfiles.com/ugd/7dd30d_87d700ff937c4733b3b0d8ed67858057.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_off0000aa63.bin
e72022b986dafad972d52197875fe2ff3de143f6bdefe1de0c84039738c63db5
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA63 5136 bytes
font_01_sfnt_off0000bbca.bin
e690b5e10aa8ff5b3874adaa5e06e4425ff85037b357cffd958762ce7b85c724
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCA 12144 bytes