Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdefbfca790980e…

MALICIOUS

PDF

33.2 KB Created: 2020-08-08 06:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1605691e7b1fc51550215d8ed6a00cfe SHA-1: 8dd5a75a4a21d1da79e94349a3bb820679fb18cf SHA-256: dfdefbfca790980e2be28339a4394623db2f20695af035887f0450841644a2d7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, many hosted on Shopify, suggesting a link farm or content-luring tactic. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=blowing+in+the+wind+guitar+pdf
    • http://files.spectacleeventrentals.com/uploads/1/3/0/7/130775257/menelirado-tavolixusajome.pdf
    • http://files.graceforthebroken.org/uploads/1/3/1/4/131438073/4274376.pdf
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdf
    • http://files.mediabrewers.com/uploads/1/3/2/6/132696506/6417778.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/horacio_quiroga_el_almohadon_de_plumas_y_otros_cuentos.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/js_fetch_post.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/sazafavobozezez.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/serenity_prayer_printable.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/vupiwefedugapamuxub.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/descargar_libro_caballo_de_troya_4_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/32065828454.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/wuwogutofugel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5066/files/zigedixevigixoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5890/files/business_administration_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/36066222766.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_off00004608.bin
2ce58805edc0f82861c37a8fdf6e31c295fb9264b53554d34ee3a4e8cac0f29d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4608 5264 bytes
font_01_sfnt_off00005801.bin
090085c7534577e6a16ebbc74f89b791375d3e5ec88d5c7997f1da1afab42f68
pdf-font-stream PDF embedded font (sfnt) at offset 0x5801 9416 bytes