Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9b2f97b1f4cd1a…

MALICIOUS

PDF

39.9 KB Created: 2020-08-24 10:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02029f2242fba2c64fc6680af63b9e8c SHA-1: fa5981a1ad93ab7520da3e5fcabbee226060c2b8 SHA-256: 8e9b2f97b1f4cd1a83161c9aaa260bc98354b7b236144be0da4a43b145b557d9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, however, redirects to `ttraff.cc`, a known malicious redirector. The document body text, though partially corrupted, suggests a lure related to 'drivers permit practice test questions and answers'. This indicates a phishing or scam attempt where the user is enticed to click a link that ultimately leads to malicious infrastructure.

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=drivers+permit+practice+test+questions+and+answers
    • http://files.servpro-philippines.com/uploads/1/3/1/4/131438226/2061959.pdf
    • http://tixebekul.daniellebanas.com/uploads/1/3/1/3/131383791/fekotem.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1685/files/fivazojobupidejejuditonip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/toeic_answer_sheet_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9516/files/89676572315.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2181/files/55217221304.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/7239465053.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/ap_reorganisation_act_2020_notes_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/36601868839.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/89795815164.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/france_24_reporters_francais.pdf
    • https://cdn.shopify.com/s/files/1/0439/1642/7419/files/bawuvememokukovuguku.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/96_lincoln_town_car.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5303/files/cracker_barrel_dessert_menu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/moodle_fcm_unl.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_off00005b24.bin
b3e333f377af527e6be44c0e7b889d0b309ac413e9230f95a34026f4c6001c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B24 5464 bytes
font_01_sfnt_off00006db7.bin
710bdb48f85068b1a233efef3e05ad68d4e7114c5a512336e1e3f1484bea9908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 10828 bytes

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