Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadda856f131072f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 01:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a46f512ac35a18afc8ce393728b6e0 SHA-1: ff2ac111f7ad976368873d4d3c5428728cd26221 SHA-256: aadda856f131072f7e880d05a7d5f8478dbd020c67f143d6a1da548c0a6fdd58
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru), and another flagged a PDF link farm. The document body, though partially corrupted, contains text that appears to be a lure related to a news report, further supporting the malicious link redirection attack pattern. The ML classifier also strongly indicated maliciousness.

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=mariam+khan+reporting+live+written+episode
    • http://files.queensofcountry.net/uploads/1/3/1/3/131398555/sudevokas-rurajowip-xevisefi.pdf
    • http://files.seaspalife.com/uploads/1/3/1/6/131637240/8650119.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/47549753962.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/motufalid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7904/files/tedefenokujoribeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/burma_tv_7.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/teen_angst_naaah.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/56426608063.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/practical_handbook_of_spatial_statistics.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_off00006e0a.bin
11bf29c9791ddbef676c9a03b2793163d34ede1d6646be17f6ef51f0c181e6ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0A 5596 bytes
font_01_sfnt_off000080ff.bin
9c7dccd2f8c28ca33d70abcb2732a99aea85c1d9f7b68de21162aa44652732e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FF 10376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.