Malicious PDF — malware analysis report

Static analysis result for SHA-256 5620a86ecb152cb0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 03:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19071c0370c430c32b7ba414c408eac5 SHA-1: 575114262dc9d316d583f8ad6695c3836116a7f5 SHA-256: 5620a86ecb152cb0aed2a3fa7717b4e3094604adf6307839a00cf19674c0530d
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure.

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=teen+titans+go+song
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0456/9815/4652/files/jomibifadigusadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/8271623493.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/where_to_stay_in_tokyo_japan_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://static.usrfiles.com/ugd/19103d_4d5b49fd804545ee9eb0ba99c2b42680.pdf
    • https://static.usrfiles.com/ugd/963627_4d4693433a434b75baf9c2b409885bb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6f2e82f2056476c8f128984f862d88f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c30d21a8b8c4586b5e78b68638c2b08.pdf
    • https://static.usrfiles.com/ugd/57c819_cd4402799e784f0b8f157ff44ca7ce38.pdf
    • https://static.usrfiles.com/ugd/a1fb72_6c1518b68df446cc89be48af7b3cf8d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c34eea607d423bbeb400693806f6c4.pdf
    • https://static.usrfiles.com/ugd/b7306e_d5cae692d3a54464965304cba5f7dd30.pdf
    • https://static.usrfiles.com/ugd/b8c837_a32b667547324476903e0ce391f8835c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5360837f048243f5b64ed894b6c65273.pdf
    • https://static.usrfiles.com/ugd/80c1db_bf1509bbfdaf4f7b9e4cad077d75de0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_61462ffe63534f3cb1f39665c46fd009.pdf
    • https://static.usrfiles.com/ugd/b8c837_25bc10c4aeab49bfb623038ca7ad96a6.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_off00006065.bin
4376b28ca74a45f031f7d37c7b7d19b369fce5ffd674f12c9487028a3dc95b47
pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 4672 bytes
font_01_sfnt_off0000705c.bin
0ecf33238b5e9368f5b188df2158acbca13f2ad033fdb6035a4ba7156c8a2aab
pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 10024 bytes