Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aac680ca29651d7…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 23:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef2f04376b94a2e0e5a823ecf6d32dc5 SHA-1: 83b40af843653166909ed69bdac95be1220121b8 SHA-256: 4aac680ca29651d758c0a4d4633b23a707d71b773131827285b9f675f7f350a9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=hybrid+and+alternative+fuel+vehicles+halderman+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The document body itself contains the malicious URL and appears to be a lure related to hybrid and alternative fuel vehicles. 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.ru/pify?keyword=hybrid+and+alternative+fuel+vehicles+halderman+pdf
    • http://zajawo.adrianafontes.com/uploads/1/3/1/1/131164250/netozolagili-tatadir-lodudilokokaj-wejis.pdf
    • http://jikasabi.shootingstarsproductions.com/uploads/1/3/1/4/131407406/597e64254203.pdf
    • http://files.denvermindfulmedicine.com/uploads/1/3/0/8/130813095/0be2d3.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/1589178539.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/wufigofivipaloviti.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/79383813652.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/blood_type_o_diet_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/5547/3059/files/71500769469.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdf
    • https://cdn.shopify.com/s/files/1/0434/3326/3253/files/pogejikavixen.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/74117572826.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/78566532399.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/60621696486.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/86969805957.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_off00006f67.bin
89ec1f952d935a8c86fe9017fe9f35b0be1d233b9bc55a6975f06e6e8fb43323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 3596 bytes
font_01_sfnt_off00007c0d.bin
5bb016c8030cc5fd6cab2631ac0f6300a7129e634d2709edd6bf4e9db0bf05ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0D 5656 bytes
font_02_sfnt_off00008f22.bin
9d0710df8fcf64e987a33ced0064c00ca5837eb72182846d13c1e8d1af752140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F22 10404 bytes

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