Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bf6ac83d4ce6b1…

MALICIOUS

PDF

43.0 KB Created: 2020-09-16 20:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed221f500e57edf2797e7c89daa3ecaf SHA-1: d9045207c4acba07e088b37538f9cc6314707471 SHA-256: 90bf6ac83d4ce6b19248cbe2ec2d8500bcfa3c82d6533ab1ee77521c428dd8e4
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.me/wix?keyword=what+is+a+feature+type+leader+are+you+quiz', is identified as a malicious redirector. The heuristic firings indicate a deliberate attempt to create a link farm, likely to manipulate search engine results or distribute malicious content through these links.

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.me/wix?keyword=what+is+a+feature+type+leader+are+you+quiz
    • http://files.newenglandbusinesscenter.com/uploads/1/3/0/7/130740173/4577620.pdf
    • http://files.jillianbretzdoula.com/uploads/1/3/1/4/131437711/wikiguv-zemajafamekosim.pdf
    • http://banav.collectivesociety.com/uploads/1/3/2/6/132683014/7478174.pdf
    • http://rovel.fabiochef.com/uploads/1/3/1/0/131069891/sejoludopub_xipade.pdf
    • http://xufejiwig.woodenseahorse.com/uploads/1/3/1/4/131437833/6848122.pdf
    • http://files.dxnvasupalscreation.org/uploads/1/3/2/6/132695329/c1103dcb98551b5.pdf
    • http://files.worlds50bestsushi.com/uploads/1/3/0/7/130776609/warujesipene.pdf
    • http://lelulum.jennisolyoga.com/uploads/1/3/2/6/132695535/3a4e6f1f9c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/gigutafedumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/beck_youth_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/law_and_order_trivia_questions_and_answers.pdf
    • https://c2dd382a-f7bf-4f7f-8bcb-692d22f9336a.filesusr.com/ugd/eb4c03_73c3b0686b70418aac3ee261a31c63c3.pdf?index=true
    • https://76ed91da-bf49-4857-8fb2-81681ff65da8.filesusr.com/ugd/8e66a5_47e6eb5117d64c3a8bdcff3e2c4c1e0d.pdf?index=true
    • https://6bbc9763-c624-4859-a0bf-0681f0cc541f.filesusr.com/ugd/9ea91e_5c3853b5d24c4b4e9c06cf12a2e87d85.pdf?index=true
    • https://45442de1-0c98-4fc4-b74d-25d4f0dfdb35.filesusr.com/ugd/d38238_e3f5d69b6f4f4666a9e9d1600c330845.pdf?index=true
    • https://1f89eb0f-5c44-42b4-aaae-85971dc318c3.filesusr.com/ugd/60ffa2_2dc194f1b22442779bd4c9161d351a9b.pdf?index=true
    • 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_off000069a8.bin
43589a0d9d69501c561aba87062bcb2fbd78803def335c69c984e1cdde448949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A8 5420 bytes
font_01_sfnt_off00007c29.bin
7ac9824d27b563efc455196fb8053287f5d43596774e28fd5b2b81c5c53cfee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 10188 bytes

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