Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef2fa6b02230279…

MALICIOUS

PDF

40.1 KB Created: 2020-09-07 15:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 483f7544bb653bb1b88ccddbca90075c SHA-1: c88eb80cb07d34cc8eb32d27db2f877e2b9e6617 SHA-256: 8ef2fa6b02230279b28be9c8b801ad8517e3d92c3d6b774780d51a730877b448
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a malicious redirector at 'ttraff.club' that is likely used to distribute cracked software. The document body and embedded links suggest a lure for software piracy, potentially leading to further malware downloads. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=articulate+storyline+360+free++crack 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/1/0434/0206/8122/files/vejebasopunivivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/hands_on_machine_learning_for_algorithmic_trading_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/zimmerpflanze_bestimmen_blattform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/datasheet_mosfet_irf630.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/882da0_eaea632775954a6e85ae0f7dbb36d6d9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/47335658670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/microplastics_in_water.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/62811353515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/film_acting_exercises.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ad2ade_9b56bf393fc04375a3dd5f12cf6417d2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c068f8_781efecea1c94459b5d95eefe1cab7f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c5d40f_d2bb23f3715b454aad19df405b19c173.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_off00005d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3E 5488 bytes
SHA-256: efa74f2f2f02f38e376371cd3e656e323679f29f831a789e285381f18d079159
font_01_sfnt_off00007003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7003 10456 bytes
SHA-256: 3e65f9f00462410464d6d3e59e8643398038e7dd9e89a068a4c42b1fef350291

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