Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bea5e33f7a90f9…

MALICIOUS

PDF

42.3 KB Created: 2020-07-14 14:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b62c568c3e9a08f8c6eb5cc1280b82 SHA-1: 61a34847badcc1c2560aa270784d9253380fee32 SHA-256: 28bea5e33f7a90f998ef7e1df2f05f6eeff761cfb0cb3c81a2d232b666b28da1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector infrastructure (ttraff.cc). The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or phishing lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links is sufficient to infer a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=affluent+society+pdf
    • http://files.exceedthestandard.com/uploads/1/3/1/4/131406606/kuvamalu_fajutilelokoki.pdf
    • http://files.owensborofirst.org/uploads/1/3/1/4/131437666/9935465.pdf
    • http://files.autoglasstv.com/uploads/1/3/0/7/130775462/zavunale_futeluxomob_menolibawosu_kosilopu.pdf
    • http://files.greenhillsrec.com/uploads/1/3/1/3/131381422/b9555.pdf
    • http://files.liftoff-travel.co.uk/uploads/1/3/0/7/130775838/d344cea4.pdf
    • http://files.gardenspotrentals.net/uploads/1/3/2/6/132681938/finefenusavat.pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • https://kabowaxebedo.files.wordpress.com/2020/07/86541766845.pdf
    • https://dadetowivul.files.wordpress.com/2020/07/97508402251.pdf
    • https://metekaz.files.wordpress.com/2020/06/15038160050.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/dogixikoladomutimomaken.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/9443725736.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/80812563809.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/8013205256.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/nibudugevovikevewosazefav.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/
    • https://kabowaxebedo.files.wordpress.com/2020/07/8654176684

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006879.bin
125e7d77f4ad1fa740cba28515e82ecf1603672ed9af960a3681bbb65a44bc7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 4816 bytes
font_01_sfnt_off00007901.bin
90dd3b14bf4c566ee3c4e617d0dee99b7436b77f56558d0208a8b4952cd9648e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 10256 bytes