Malicious PDF — malware analysis report

Static analysis result for SHA-256 def921ad53d18a32…

MALICIOUS

PDF

48.8 KB Created: 2020-08-17 00:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45b1c13a0e71c076a8e3724847392359 SHA-1: d829b3bb94b2a75956ad1d940038b95028078525 SHA-256: def921ad53d18a3253070a2dab74246bb6f3650558462e19eefdf5cf75991c3e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=modern+calligraphy+tutorial+pdf'. This URL is presented within the document body, disguised as a calligraphy tutorial. The PDF also contains a link farm heuristic, with multiple links hosted on Shopify, suggesting an attempt to distribute malicious content broadly. The primary malicious IOC is the ttraff.ru redirector.

Heuristics 3

  • 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.
  • 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=modern+calligraphy+tutorial+pdf
    • http://files.aurorahealthservices.com/uploads/1/3/2/6/132682106/a3ef653.pdf
    • http://fufimala.ceramicsmaui.com/uploads/1/3/0/7/130739591/6135623.pdf
    • http://tejiveba.praisenyc.com/uploads/1/3/0/7/130776827/bizirijabojivudojis.pdf
    • http://files.hartmanholistic.com/uploads/1/3/0/7/130776676/xoxew-rafadugi-miroxeg-teviguxogat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/16390701164.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/4487746459.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/website_design_process_steps.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/microsoft_document_imagining.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/4766051859.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/hansae_co_ltd_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/zutotajisulukegut.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/54620720960.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/15369528579.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/apartheid_foreign_policy.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7427/files/xosazotuzedepidoterol.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_off00008184.bin
feb7411e35e6742a18b5092781074cf422889ec8d11573941c3a060e3b277851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8184 5348 bytes
font_01_sfnt_off000093b7.bin
b6092cb4b1028e8717843bb0e944867b63e60670621710679368a24621beb8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B7 10032 bytes

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