Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b09908866f7635c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-29 11:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 529c81dffbed27eaa4529e18e8176f11 SHA-1: 4b3b9c416ef2842217832cad78d6b6e9ddedc1e4 SHA-256: 4b09908866f7635cc3f7c9c3bfd421d865210d91e130a74a9a79e8898d0c824c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=ense%25C3%25B1ame+a+hablar+gloria+lopez'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on 'static.usrfiles.com'. The document body, though heavily garbled, contains the same redirector URL and several 'static.usrfiles.com' URLs, suggesting an attempt to disguise malicious activity within a large number of seemingly benign links. The primary attack vector appears to be social engineering via a deceptive link.

Heuristics 3

  • 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.
  • 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=ense%25C3%25B1ame+a+hablar+gloria+lopez
    • https://static.usrfiles.com/ugd/b8c837_7d9e9592253e44b8b58d25baa5b756a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_80e19b26f10240deafd219c1f00d60c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_05c51dcbf4d74074a459d27da6beca0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d397ffd1d1e4525ad133c0691dc4ed4.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/jovin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/xomepetopigida.pdf
    • https://cdn.shopify.com/s/files/1/0461/9206/6710/files/destination_wedding_save_the_date_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/87713838647.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/greg_kihn_songs.pdf
    • https://static.usrfiles.com/ugd/b8c837_233d63fd43384f64a6583dfb153e8502.pdf
    • https://static.usrfiles.com/ugd/b8c837_37ebca5215094a1cb1e566d6df96baff.pdf
    • https://static.usrfiles.com/ugd/05900a_1506fd19a86745adac08b8f355247694.pdf
    • https://static.usrfiles.com/ugd/b8c837_564a652eb83b4f5a923aa5e0bee86d9a.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/look_and_answer_tradutor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/babist_faith_crossword.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005044.bin
2582b7b22b549b45982b46ebc45e185bf90d71740435f8b9a6796f54587b6162
pdf-font-stream PDF embedded font (sfnt) at offset 0x5044 5592 bytes
font_01_sfnt_off000062d4.bin
bdaefc9c1b44d41f8c64013747704fcf67bc3833e763dfb0c88d29d932b80190
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 10952 bytes
font_02_sfnt_off000086a5.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A5 16144 bytes