Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7fc16f3e2bd8fd…

MALICIOUS

PDF

51.8 KB Created: 2020-08-06 13:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e82f5f40fc5c6981f516fbaebf20b50 SHA-1: e0be21f6879b8ebe6b82e4b2f2c701bc83d8882d SHA-256: dc7fc16f3e2bd8fdb36c29372d4a6f8fc23f1e741d38ad5efb6ee43d2ff83d73
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on Shopify. The primary malicious URL is 'https://ttraff.com/pify?keyword=algorithme+matrice+exercice+corrig%25C3%25A9+pdf', which is likely used to lure victims into downloading further malicious content or engaging in phishing. No scripts were extracted, but the document body contains obfuscated text and URLs, reinforcing the malicious redirection intent.

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.com/pify?keyword=algorithme+matrice+exercice+corrig%25C3%25A9+pdf
    • http://gonavev.reannhuber.com/uploads/1/3/1/6/131606069/28f77056.pdf
    • http://files.balletclassique.net/uploads/1/3/1/6/131608016/01cb921f4.pdf
    • http://files.britishrecordshoparchive.org/uploads/1/3/1/4/131482884/xejaludalawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/calendar_printable_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/orbit_6_station_timer_manual_57161.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/xexedorawapalumopadavogog.pdf
    • https://cdn.shopify.com/s/files/1/0438/9237/5704/files/41918439897.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2315/files/gold_pickaxe_stardew.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/wosasaxorimerimipulawada.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/11086494754.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/91845705411.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/4687197108.pdf
    • https://cdn.shopify.com/s/files/1/0433/4760/7720/files/lodatenamalorejekob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/boricua_definicion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000706e.bin
51ada7e575293a7fd6d649a285c1764f76ea46404d15907d185eeb62f2ccffb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 5272 bytes
font_01_sfnt_off0000821a.bin
96d1a2c8b8cdb0eb207847b8d9c862d46e39d241336c3c0c5c0088d878df6aee
pdf-font-stream PDF embedded font (sfnt) at offset 0x821A 15992 bytes
font_02_sfnt_off0000b1c3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C3 4324 bytes