Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd53d7f5c98b09b6…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 17:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7fdbdcce67db0c14cb63dad4ad40716 SHA-1: 3141d6e70e3dda82e0940811d8fe111a7205e59a SHA-256: dd53d7f5c98b09b6166b85e51038ffb38e9518460576bc6a9c51398820a207ac
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text related to email templates and the PDF's creation tool, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection 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.com/pify?keyword=free+responsive+email+template+bootstrap
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdf
    • http://files.rivermontfarm.com/uploads/1/3/1/3/131380889/soridonuno_golozamino_zedulusewevoset_wowobafelawola.pdf
    • http://files.hopecolette.com/uploads/1/3/0/9/130969352/9310413.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/41444408276.pdf
    • https://cdn.shopify.com/s/files/1/0455/3284/0101/files/west_side_story_vocal_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/17349463272.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/17516702994.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/napajumojiwili.pdf
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/toefl_practice_test_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3195/1517/files/mega_man_gba_games.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/aplikasi_video_dari_twitter_untuk_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/9857041096.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_off000075b6.bin
8b479feb8cbb93127818de3a89b24a65b3e489981c1fd6894494db90820d9b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 5120 bytes
font_01_sfnt_off0000870d.bin
68c33f0076b938ac74c3f44cd03c73c3937589707bdfde7b095341e0f7f433b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 10480 bytes

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