Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c27ac769ef4eb09…

MALICIOUS

PDF

59.4 KB Created: 2020-08-02 16:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a0c5b1d749b6b741d45c28b245d827 SHA-1: 2ac292f263d96185b0c512519a0bc127a5f8c97d SHA-256: 3c27ac769ef4eb097f246dfe10322c3b52aab651cbdcc4e9409bdeca358a8356
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector (ttraff.ru). The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting a SEO poisoning or link farm attack. The ML classifier also flagged this PDF as malicious. The document body contains garbled text and a URL, but no clear instructions. The primary attack pattern appears to be link manipulation for SEO or redirection.

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.ru/pify?keyword=terraria+weather+radio
    • http://files.cowgirlastrologer.com/uploads/1/3/1/3/131379724/turuwaxarawipo.pdf
    • http://files.amiras-world.com/uploads/1/3/2/7/132740249/aee6024.pdf
    • http://files.theandrewsfarm.com/uploads/1/3/1/4/131453401/2292643.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/wiweloxito.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/puwejanewolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/sijojaloxagivan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/lunugubuzudenilaret.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/25638975550.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/wuvogamababobomeper.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/ronoriviverawajugimarape.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/42549379698.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/46241097806.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/zolukojakabig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/zilunow.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_off000063b0.bin
c7caec640475ee0d51aa13d1d3fe2ab8c5bb81e6f346c68145387074730db132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 22400 bytes
font_01_sfnt_off0000ab59.bin
ae50e3733fd8da2c04a0846e6885fcde8b25a4c678e205cca7f0b2d579031a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB59 4744 bytes
font_02_sfnt_off0000bb81.bin
19e55e5ee559de84a4a99fa6018be1444dd9276f5c3615db6c0d7c2927194811		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB81 10260 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.