Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7260d7cb0de7fb3…

MALICIOUS

PDF

39.2 KB Created: 2020-08-03 23:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 282c406d9e7657ff2627f101f82b4d73 SHA-1: 1b68cc8f0e018960c690564011c5d3f3168947e7 SHA-256: e7260d7cb0de7fb3671821d2288372fe1a39a4968519971a3a78f3ec6c291cd3
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links, many pointing to what appears to be a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure users to malicious infrastructure. No scripts were extracted from this sample.

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=abutment+design+pdf
    • http://files.display101.com/uploads/1/3/1/4/131453252/lutamawofid.pdf
    • http://files.connyscoaching.nl/uploads/1/3/1/4/131452961/megemonimitam.pdf
    • http://files.allergicandyummy.com/uploads/1/3/1/4/131453188/7393208.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/zunazamivitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7338/9223/files/87828942395.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/60760183697.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/tasokitomiwiwewiwo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/waxesunegodemiregujeriz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3522/8317/files/49587884363.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/fosizawit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/radubezinanidasaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/navowaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/merufosama.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/50272770244.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/fepajatefamabupugisegir.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_off00005e10.bin
6a15720dc456199bd1e5ee58dfaaefe51f36b310ea0bb352926af78eb025677e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E10 5152 bytes
font_01_sfnt_off00006f88.bin
31e036b491d69b8652315186fd0274998205ee01cceb8caa87476c531fc5ea0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 9656 bytes