Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5236c5d80f94ad…

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 04:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7df4ef38cb30e6f375e360687cd5ebad SHA-1: f372f741dfc74cc5945c4085f861e6baf04d1118 SHA-256: 7d5236c5d80f94ad134f801f107cf72d12f2d59835927d47667dcd0115824f15
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One prominent link, 'https://ttraff.com/wix?keyword=cape+may+fishing+weather+report', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to fishing weather reports. The ML classifier strongly indicates maliciousness.

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/wix?keyword=cape+may+fishing+weather+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/stickers_whatsapp_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/ranma_1_2_live_action_pelicula_completa_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/keloid_formation_nipple_piercing.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/zemapimegevuna.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/95228443184.pdf
    • https://static.usrfiles.com/ugd/455f95_00b9afb093f1447ea48b6e497abb5199.pdf
    • https://static.usrfiles.com/ugd/b8c837_10c490bdd8774643ac54b12024c3efec.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_a94f16d4826048f9b8adcfcd12ff7607.pdf
    • https://static.usrfiles.com/ugd/4dd980_0f744d385d7b4042980c8965ace2983e.pdf
    • https://static.usrfiles.com/ugd/74a852_8ece877db9e54ea4a483a2a5c07610c0.pdf
    • https://static.usrfiles.com/ugd/0c41e7_3f688d22f18a43febc79c94565f2a180.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_b4e02b05251d4a8da7db8e8202cd6ad5.pdf
    • https://static.usrfiles.com/ugd/5b5da7_d9346c2151f24226bfd7680eb2b37e1f.pdf
    • https://static.usrfiles.com/ugd/906e9f_3e9c820d093a450ba4ef8f1d8290a4c7.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_off00006088.bin
060beba81f1ebc8ee13df0384c10a91f45334ce6b3b2237ab065c600cba2ab56
pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 5380 bytes
font_01_sfnt_off000072cd.bin
d6a0abf1277daf760e094ac1bcd36a09398e773f5f4a0099a6c583ba95b1d7bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 9968 bytes