Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c229ac63c93101…

MALICIOUS

PDF

40.2 KB Created: 2020-10-27 23:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cf385e23a46beb0e9c693c90e78f3380 SHA-1: b32fb665fe81528908d2a760fd12c77cbf685ce0 SHA-256: 29c229ac63c93101c8edb0b2992c6d13d29454420a55db44bc313125d69099fe
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding numerous URLs that lead to external resources. One of the embedded URLs, 'https://ttraff.link/123?keyword=method+overloading+javatpoint', is identified as a known malicious redirector. The document's structure and the presence of this malicious link strongly suggest an attempt to redirect users to harmful content, likely for phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/123?keyword=method+overloading+javatpoint In PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/rufudijavorexot-gekurebi.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://sinepakeje.weebly.com/uploads/1/3/4/4/134490574/natijef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f9180331fa98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f91e520063c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f9505c01ecd0.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/joxowu-kokedexut.pdfIn PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/2196203.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/6379806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f888cd0e0e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f8b77a4091d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5f967588e54fc.pdfIn 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/1/0431/5784/8224/files/2020_form_6198_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9557/3158/files/getting_from_college_to_career.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4699/3557/files/21851868255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5222/6472/files/vda_automotive_spice_guidelines_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/agarose_gel_electrophoresis_practical.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/alice_in_wonderland_jr_score.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_off00005c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C07 5184 bytes
SHA-256: 9fbdf5a37efa1f28551e24e69590d6ae81ff3e97a77968c5d2c708a8d2c1c776
font_01_sfnt_off00006db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB9 11172 bytes
SHA-256: 779c7e95467673d22fd30a9932df5acfa2c9ff62e29a603a795d4c73745698d0

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