Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9eef5923347ea5…

MALICIOUS

PDF

33.3 KB Created: 2020-08-30 23:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22a39c77524bd05f015eb268d78ff97a SHA-1: a7f2b6e3aa367d3ac838ed0fbf14123123e3dc47 SHA-256: fa9eef5923347ea5dd0b9fc8d3ffdf3669e9238700bd993ad2f09dd1b16fb3bc
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to ttraff.com, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic further supports this by identifying a large number of external links, likely intended to manipulate search engine results and drive traffic to malicious infrastructure. The ML_NYX_PDF_MALICIOUS score of 0.999988 strongly indicates 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.com/wix?keyword=a+boogie+wit+da+hoodie+lyrics
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/60861587702.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/63619512417.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/american_psychological_association_citation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8914/1664/files/14696924196.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/fafinil.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/central_nervous_system_physical_examination.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/dedojolavidamepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/lutron_caseta_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/aix_server_commands.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/7620670034.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/dasovilogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3916/2522/files/74631381287.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_off000046bc.bin
39a2e83abcd2f54d3998b914608fac54638934e5478318a3f351e8ca7f6e3cdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x46BC 5524 bytes
font_01_sfnt_off00005980.bin
ac676998460b2e50ba5d472a9e4de610029fd12b1daebc45ee1dc5309de5d764
pdf-font-stream PDF embedded font (sfnt) at offset 0x5980 9108 bytes