Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32e9881dd1992f3…

MALICIOUS

PDF

43.8 KB Created: 2020-08-22 21:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcb172f28116c358801fa85d2aa838d9 SHA-1: 2a38f1cb469f18832d4a8ed4260b3ae88f6a4ac5 SHA-256: d32e9881dd1992f310d71e41107e0b795a34a02531b1f8ea7cac970649eb1a49
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=battery+health+asus. The document body contains garbled text but also includes the malicious URL and several Shopify-hosted PDF links, suggesting a link farm or redirection scheme designed to lead users to 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.ru/pify?keyword=battery+health+asus
    • http://files.mingocarelabs.com/uploads/1/3/1/1/131164573/5204179.pdf
    • http://files.comfycozycleaningservice.com/uploads/1/3/1/3/131398143/6769a9.pdf
    • http://files.crossroadschurch-aurora.org/uploads/1/3/0/7/130739786/258642.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/rexofominobegexininofug.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/6332754804.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/godoralifir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/54358667389.pdf
    • https://cdn.shopify.com/s/files/1/0440/5778/8568/files/public_administration_an_action_orientation.pdf
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/wasawojumejaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/jowawokajebibewojumuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/domitila_cinderella_story.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/24746085269.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/wesidiseluxiti.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_off00006f3a.bin
823409028ac41c31dd0c8b74046351cc878b562d959e825bdd16976ad7656ce9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 4924 bytes
font_01_sfnt_off00007ff5.bin
cdb95759750d05dfbcdac24c695090eda551ce8f2ea08c03543d76f2fabb88bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF5 10288 bytes