Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eefccde635a7f58…

MALICIOUS

PDF

52.8 KB Created: 2020-08-18 17:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea5671e3e34d995f5b1afdb223d0146b SHA-1: b10ae0f4e568818a37efa93605dbb3d93b6b6e4e SHA-256: 3eefccde635a7f5814e71453c17c2b2507bfd9604f38293054c93019d23f422b
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/pify?keyword=arjun+pandit+film+song+ming', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm and a malicious redirector suggests the primary purpose is to lure users to malicious sites.

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.cc/pify?keyword=arjun+pandit+film+song+ming
    • http://files.spotonseamus.info/uploads/1/3/0/9/130969999/wegewigemajoput_votivazinikejak_xojobizus_vawiwosepeki.pdf
    • http://levixete.montenegroadventures.me/uploads/1/3/0/7/130740257/xevutopuxafaxasaw.pdf
    • http://zufotobox.montrealhomemarket.com/uploads/1/3/1/3/131398564/e0d689c70.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/52324550813.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/95423330532.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7927/files/89978642181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/nevonoxixotobitoraw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/xewarigodeluwarow.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/tamil_baby_boy_names_hindu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/it_infrastructure_project_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/dotomot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/87561082075.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_off00008317.bin
e56e6ebc502d2d6936f916e2e12ab90397537c75c2d682111fa85ff845fc44e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 5428 bytes
font_01_sfnt_off00009578.bin
2e6681de3ae5e60939cc320a3e23c44fb57ca636481f14bf59d4473f8f863dbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x9578 15300 bytes