Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72a85b0b361f9c7…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 21:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9937e61001717a430468be6685269b9a SHA-1: 43411ad85cd36007130c2f11d8d4c4857f23a2dc SHA-256: f72a85b0b361f9c707bea39fc158ff2dcba96b75ab1dd46175e107a521a75a46
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO poisoning attack. The primary malicious URL identified is ttraff.com, which is known to host redirectors. The document body contains garbled text but includes the malicious URL, further supporting the attack pattern. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

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=lintelek+fitness+tracker+guide
    • http://worilej.pattayaguesthouse-hideaway.com/uploads/1/3/0/7/130739197/25886f0.pdf
    • http://files.ocsny.org/uploads/1/3/0/7/130776054/muworikudazubux-zazeni-wuvubepajuxokut.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/banjara_thali_bhajan.pdf
    • https://cdn.shopify.com/s/files/1/0438/3142/7234/files/29089004809.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/cisco_webex_room_55_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/kogodazewofedoxan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/ti_bandicam_cho_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/cardiothoracic_surgery_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/nightbot_followage_command.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/reading_comprehension_worksheets_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/mns_blood_group_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/4010/3845/files/24876632483.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/64670500958.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/28624673256.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_off00007a3f.bin
7aff522854da77adb13dfa2b214d708ba80f3272641444e933c3b06602692da8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3F 5192 bytes
font_01_sfnt_off00008bf0.bin
439dc032d780fe3f7f7f8439034e0dedef45c14ab7bedeaeb3824925815eee44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF0 10316 bytes

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