Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f2ca8b5dff9603…

MALICIOUS

PDF

36.5 KB Created: 2020-08-24 17:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a3ab664530f01c479b822b72c983b09 SHA-1: 7e99a089277b9a6664ed7f5a07d9189b627f1adb SHA-256: b9f2ca8b5dff96037a702d46dbb83bd7a06b39b279611f671b0747f209728fc0
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at ttraff.com, which is likely intended to lead the user to a malicious site. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the target URL, suggesting a lure for potentially unwanted software or phishing.

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=autodesk+sketchbook+animation+android
    • http://vemaxabim.parohia-kassel.de/uploads/1/3/1/4/131438397/kuwimawolusutuv_zenagevok_zubolofujofu.pdf
    • http://files.mrsbsmusicclass.com/uploads/1/3/0/9/130969965/sagamaxusinidureri.pdf
    • http://gogotabi.cpfcanada.com/uploads/1/3/0/8/130874276/renemuzesetotujive.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/virebepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fapodepemiretewuroraga.pdf
    • https://cdn.shopify.com/s/files/1/0448/9910/6983/files/piwaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/86514941815.pdf
    • https://cdn.shopify.com/s/files/1/0432/5700/4192/files/alsager_school_uniform_suppliers.pdf
    • https://cdn.shopify.com/s/files/1/0450/6599/4392/files/sobiwofesuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/muriminikusofepedukinex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/mulching_sheet_uses_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/cutting_edge_third_edition_upper_intermediate_progress_test.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_off00005188.bin
f2dde902ac1c29376748e808efcdcfa13400e368cf1e1d7871b2167b9df91e03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5188 5340 bytes
font_01_sfnt_off00006373.bin
92806e0006c6687d9e08a12282f51dcad6d4bcf4afd405a43115dacebb856b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6373 9956 bytes

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