Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1450c5296cd0758…

MALICIOUS

PDF

33.7 KB Created: 2020-09-06 18:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cfed968a2ed0a87918e78a4ecd7b860c SHA-1: 14a454649d38b522fd01c33660a87eab467ce71b SHA-256: b1450c5296cd075814a199568247ba691d386bd1efc032e08e17af29f24eced4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary malicious link is https://ttraff.club/pify?keyword=danger+keep+out+template, which likely leads to a phishing or malware distribution site. The document body text, though partially obfuscated, contains keywords related to 'danger' and 'template', suggesting a lure.

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.club/pify?keyword=danger+keep+out+template In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/47433796494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/gemekafovutixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/lichfl_demand_promissory_note.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/loxevikufabiloraterel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/gateway_b1_student_s_book_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0632/7957/files/85842866114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/texas_cps_reporting.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ba583d41c11a41e580bb52d87c529493.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/368de4_3400f5c779c443ae84d5716de625f63e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d274c9f52c3740d0b0c48013583d06c0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f51585_35eed775b9aa410a817b203a5858c7c8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A7 5024 bytes
SHA-256: b554b0fdbca68b3a0e298dca53d2e9b60db49e8d2cfc7cb51702167131f0991d
font_01_sfnt_off000057b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B5 10260 bytes
SHA-256: 99629629544e307eed432d3f017cb4f657029ddb280651b8b06dc26e62396d96

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