Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8032bddb255a616…

MALICIOUS

PDF

50.6 KB Created: 2020-07-26 13:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 140c895f9c2fbab19fe930fd15a9798a SHA-1: ef96dad5d49b20dd7d249f3b4ba142cb8fde5f53 SHA-256: c8032bddb255a616e9cee1bbb04dcb118e334ee9cb16beff8aa831b38d754b76
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 17 external links, including a critical redirector link to 'ttraff.cc'. This indicates an attempt to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

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.cc/wb?keyword=enjeux%20d%C3%A9veloppement%20durable%20pdf
    • http://files.thefemalescribeofgod.us/uploads/1/3/1/3/131380875/68b82be3d33b457.pdf
    • http://files.bendingsolutions.com/uploads/1/3/2/6/132680890/fasutusaze.pdf
    • http://files.deldelorm.com/uploads/1/3/1/8/131856276/2877569.pdf
    • http://files.ruralactioninternational.com/uploads/1/3/2/7/132740620/vupese_fawabuniremakar_kukexiwafenedos_mamajubuk.pdf
    • http://files.dbardogs.com/uploads/1/3/1/4/131453127/sitadumera.pdf
    • http://files.dbardog
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/53828495393.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/saxekorujusojesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9270/files/25225315497.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/lomumevub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/11156248931.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/gefegixosuvufipesajulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/45071706580.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofolevunukexus.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/35282858220.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/mitubujekire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/4465221465.pdf
    • https://cdn.shopify.com/s/files/1/0435/9559/5938/files/kivoxodinesupexefafutiw.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_off000083bd.bin
38eb4963f4cffbb027ffdb2fff99c3d127c246afa7adc0ede0f0aa8224c03fe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 5288 bytes
font_01_sfnt_off00009567.bin
327fffaa065e6ca30e7a7b178f3d8ac20223faaa5d082b8b26fbacd2c6520163
pdf-font-stream PDF embedded font (sfnt) at offset 0x9567 12148 bytes