Malicious PDF — malware analysis report

Static analysis result for SHA-256 564d3ed3f822e64d…

MALICIOUS

PDF

41.3 KB Created: 2020-08-22 19:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29d30b9a7d29b0853b3348a3a6208c93 SHA-1: 8eebc377ea1dad2726b37b6492e87ebee969cdf3 SHA-256: 564d3ed3f822e64dc0c047396f254bf01c59fb3f7dae621948e19408afb31c94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link and a PDF link farm, indicating a likely attempt to drive traffic to malicious sites. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=funny+answers+to+are+you+single', which is flagged as malicious. The presence of numerous embedded links, many pointing to benign Shopify domains but others to unknown domains, supports the link farm and potential phishing or SEO poisoning attack pattern. No scripts were extracted, limiting the analysis of direct payload delivery.

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=funny+answers+to+are+you+single
    • http://revudaxev.georgeflcharlesairport.com/uploads/1/3/0/7/130775136/388e9.pdf
    • http://files.studio.dayafoundation.org/uploads/1/3/1/4/131454986/zekijofapogarixave.pdf
    • http://files.friendsofhuggins.org/uploads/1/3/0/9/130969974/nijaziw-vureli-nezinipi-zikitata.pdf
    • http://files.holyokemapartyrentals.com/uploads/1/3/1/3/131381055/156fcb4cdab8e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1454/3771/files/catecismo_mayor_westminster.pdf
    • https://cdn.shopify.com/s/files/1/0440/5896/8229/files/autacoids_and_related_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/46396113524.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/rafexepozuwojixakeje.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/what_is_a_weebo.pdf
    • https://cdn.shopify.com/s/files/1/0450/6163/6259/files/blumeria_graminis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4011/files/kabeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/ruwazowibivema.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_off00006466.bin
62400870d1a7067e5401cfcf23de7011fabad291ad04b91fc9b89a7eb123565f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 5000 bytes
font_01_sfnt_off00007597.bin
96b86918a668f9969dbd9faaaaa43b2e8b219e2032733837e437dc362c66ba51
pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 10180 bytes