Malicious PDF — malware analysis report

Static analysis result for SHA-256 e590858e1615f46b…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 12:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ed6f8a3c33b4acdf5c73c0f55b81dfd SHA-1: 5feff5c33933df65cf3a79545b901b608ba63b4b SHA-256: e590858e1615f46bb990f7d346bfed4e89288da6831de3242da3ff769f4132de
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but a critical heuristic identified a redirector link to 'ttraff.cc' which is known malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body itself is heavily obfuscated and contains the primary malicious URL, suggesting the intent is to redirect users to potentially harmful 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.cc/pify?keyword=abide+with+me+guitar+chords+pdf
    • http://files.quadcityarts.org/uploads/1/3/1/6/131606874/visubusoguxoxo.pdf
    • http://files.deltatacticalknives.com/uploads/1/3/0/7/130739718/9868545.pdf
    • http://nisiv.webuildmilehigh.com/uploads/1/3/1/3/131383949/1149202.pdf
    • http://files.artsforart.org/uploads/1/3/2/8/132814355/9896309.pdf
    • http://kadixazo.texaslymealliance.net/uploads/1/3/2/3/132302921/tosevejomabomix-lirosake-naparimoki-gajaxejaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/gepugiparedarajekakawum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/castlevania_sotn_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/70502419817.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/konomivepafulegi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/operations_management_11th_edition_stevenson.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/68727819669.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/89769158529.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/58351421049.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/87109126450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/knowledge_acquisition_in_artificial_intelligence.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_off00006a89.bin
13ae341c995800a7624b299c341a776567758e2c6860dafae086b7613429b057
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A89 5760 bytes
font_01_sfnt_off00007e07.bin
808e97e8c4f67957d022ee1364b9a1c26b461ccdee583fbea01798606d61a311
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E07 14612 bytes