Malicious PDF — malware analysis report

Static analysis result for SHA-256 98eee1dcf059a714…

MALICIOUS

PDF

44.0 KB Created: 2020-08-14 02:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eca785baa5e5d21785b7456da9411bf0 SHA-1: 46d5751ceb8ce5f6cb4b705d8c539152daf09ac8 SHA-256: 98eee1dcf059a71421b6dfbbe0ec85b277105fac505502b5ab33c3fba21c7a8d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for free software. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic shows a large number of external links, many of which are hosted on potentially compromised or malicious domains. The primary malicious IOC is the ttraff.cc redirector, which is designed to lead users to further malicious content.

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/pify?keyword=ccleaner+windows+10++kostenlos
    • http://files.kellycarmichaelbooz.com/uploads/1/3/1/6/131637137/7668685380.pdf
    • http://files.stonecreekcabins.com/uploads/1/3/1/3/131384575/lepajo-gejexoxexo-kiwojiwiboga-zajusoguka.pdf
    • http://files.rafibsley.com/uploads/1/3/2/8/132815979/gesipifokuzumuz.pdf
    • http://files.basicambition.com/uploads/1/3/0/7/130739308/tuvubok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3004/4062/files/gokudebimegapiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/grammarly_review.pdf
    • https://cdn.shopify.com/s/files/1/0431/8173/6096/files/alpha_beta_pruning_example_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7782/files/89150821786.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/74758223575.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/88431113801.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/77240457129.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/ponoradobovupasidinemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/algebra_formulas_with_proof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/56527174608.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/bsc_1_year_inorganic_chemistry_notes.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_off00006177.bin
129b79ea190cdcfaceb7490a261686b1eea626a88c933c0dc28dc9fe9c05d648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 5096 bytes
font_01_sfnt_off000072de.bin
c44ff8331dae53aed8ded28531403a02d46377c0a0c78d566769a2d1a8e20e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 10108 bytes
font_02_sfnt_off0000953b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x953B 4324 bytes

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