Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a437689308a70…

MALICIOUS

PDF

49.6 KB Created: 2020-09-06 12:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4941e050f5602c9fa5861f48b8e05b5 SHA-1: 41f970d8085b5a5e9aa8afc0f2e3e5f531a1f027 SHA-256: 000a437689308a7097182c3954a2f3479efca31e180b2bb2eb28f0d5a46a9c4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly flagged this PDF as malicious. The embedded link leads to a redirector that likely serves further malicious content, masquerading as a generator manual.

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=champion+generator+3100+owner%2527+s+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/vunudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/nunozogazowilesoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2806/files/sims_4_wickedwhims_patreon_animation.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/71984213400.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57727452667.pdf
    • https://static.usrfiles.com/ugd/9d66c7_b3a8edace40a47c6a667da0da7e03da5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3231aef4ee41f991438e683adcb6bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3902005ac65449fa4739ab3008de5bf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0082/files/70381856273.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2201/files/pojidepazuvon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/causas_del_cancer_de_tiroides.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/division_tables_worksheets_1-_12.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007406.bin
348ee924ce1642bc6c188b5d8b55cf2e5be080a2c24410576ef47e01eef4c5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 5624 bytes
font_01_sfnt_off00008722.bin
a4cfa4700179b919bd5620a1ed57f35c9183d311248faeff6288029c44117d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8722 10520 bytes
font_02_sfnt_off0000ab2f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2F 4324 bytes