Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4f62b8fa0cfcd0…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 05:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b6b4e815dc286b09d8f7a0e50d3ea5 SHA-1: 7db254eeb66c55dd57385b422fd1feb3ef4f5635 SHA-256: ec4f62b8fa0cfcd090c3ac460551f1baa4d5b2cd296b249f3a6367ff4ae80a29
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm. One of these links, 'https://ttraff.com/wix?keyword=cancionero+para+guitarra+acustica+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated 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=cancionero+para+guitarra+acustica+pdf
    • https://static.usrfiles.com/ugd/8dde66_bb706bb900b844faac7ab31da5a446e7.pdf
    • https://static.usrfiles.com/ugd/3bf302_a9b5cc63bf8448f7b96c6f7e4dd62d3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4e3d1d74f947e1ae4d67666191a89f.pdf
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/nuzodatetotuxix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/arnold_chiari_malformation_syrinx.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/peter_thiel_0_to_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/2018_chevrolet_equinox_owners_manual.pdf
    • https://static.usrfiles.com/ugd/516793_fa388e165b26432d91c8f094bdd06abe.pdf
    • https://static.usrfiles.com/ugd/f46427_8cfafbe218cf4825b7999403354ddb4c.pdf
    • https://static.usrfiles.com/ugd/289c5e_e4ba0c3d8eb7461784b255b5f0cf4b63.pdf
    • https://static.usrfiles.com/ugd/b8c837_52420dc35d35428d9fabd42195870765.pdf
    • https://static.usrfiles.com/ugd/b8c837_e268caaef2da41fcadac0c154334b4f2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/makoriziro.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_off00006807.bin
13f084f439ab3727085a68da1518ab281e1d4540d8300aeceba26b36289f0dcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 5196 bytes
font_01_sfnt_off000079b6.bin
ac14972b7b2947834c866a693307dd83921f9e40fad0e2ab592cecd13463aa54
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B6 1888 bytes
font_02_sfnt_off000082c9.bin
02f63d7944f18b2b9994127464276e8aed7dd033f0785a13b3c782a61712d6c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C9 11576 bytes