Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8e557540041772…

MALICIOUS

PDF

120.3 KB Created: 2020-10-27 07:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b00aa9c9708c87fe2c324aa59654a808 SHA-1: 26bcc1b007c4b1d19a292691c208e15972700196 SHA-256: be8e5575400417722d19d27d94aa0a5d12328720fe11628ae54473a7f7050006
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirector services, indicating a link farm designed to lead users to malicious content. The presence of a link to 'ttraff.cc' with a keyword suggests a potential phishing or scam attempt, aiming to exploit user interest in specific topics like technical manuals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.cc/123?keyword=powerflex+40+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f885f320ecdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8f988346225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f8bdf98b374b.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/b9ae3.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/vuluzasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5f926e35b5e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5f946d7eee850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f8b088e2655e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f876056ef779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f8f94f1c7d4e.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/bevuxagawa-bewowidot.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/fa348fb127f.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/notofowupabapopegi.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/98b5f1dd.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/1897080.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/1856924.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukedil/aha_bls_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/centrifugal_compressor_types.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/xerufex.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/bezuzupofowunezutuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/learning_drawing_and_painting.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8A 5124 bytes
SHA-256: 64daaece3dea9ded1eaaa2d3eb9390e537c35fcbf148ed390ef1afafcb97ce94
font_01_sfnt_off000190f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190F6 12460 bytes
SHA-256: ddd3f466d04aed89f6337287278f60810321bdca2be16f206151a4986739c3a8
font_02_sfnt_off0001bb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB5C 17148 bytes
SHA-256: f4df683b5cc64399f613edc6519d58606135abfad80f62b727a1bb8644b3a601