Malicious PDF — malware analysis report

Static analysis result for SHA-256 14636ec593ff54fe…

MALICIOUS

PDF

45.4 KB Created: 2020-09-17 16:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97db86991a97e107f2781294536fe0f2 SHA-1: a2c81ac957b971ce89727f736468f26a09cc4a9e SHA-256: 14636ec593ff54fedc24c24c2b03d5724d9124baa3d1c1141a7d91e8e6b006e5
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for game-related content. The presence of many links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and link analysis indicate a phishing or redirection attempt.

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.link/wix?keyword=osrs+barbarian+assault+guide+reddit
    • http://gobuwis.napashuttlelimo.com/uploads/1/3/1/3/131384260/85ebc737.pdf
    • http://files.globalqualityenglish.org/uploads/1/3/1/3/131380438/bd9d58b71b.pdf
    • http://pupefinax.robynpforrryan.com/uploads/1/3/2/6/132696063/pegekepogon.pdf
    • http://files.bestofboisemoving.com/uploads/1/3/1/4/131438439/punarepe_wuvowozivuzo.pdf
    • http://files.landofmadmen.com/uploads/1/3/1/3/131397927/nexixofumekata.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5f8145af-f6fc-41c9-8677-37d7fbec3560.filesusr.com/ugd/b361c6_5ca8977e03194c289598518eb64f5ca0.pdf?index=true
    • https://43cad07f-684a-453b-bdd4-a3ffa2448a0f.filesusr.com/ugd/8a9bcc_7999d08c22ab41c58d7387663cd8af04.pdf?index=true
    • https://36b34ef2-6949-4217-ad40-73a12daa4dee.filesusr.com/ugd/784815_54a9ab7f671b4df280083d966e98000c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0484/2992/4520/files/charlemagne_bot_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/678_279_7980.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/aguero_injury_report.pdf
    • https://e5e172c5-a3f2-4d29-9d8e-db06e80a86e9.filesusr.com/ugd/c6ac46_794204c61461439886f5d7122d7f01df.pdf?index=true
    • https://e799c7b7-f1ad-4464-ba36-91cc35af5674.filesusr.com/ugd/dec231_11243444c5184aadbf579dabdabe6122.pdf?index=true
    • https://2b481422-e25e-43d1-9d06-b565fd22a86e.filesusr.com/ugd/e6e573_8fffd839817a4894a6486e9397f5f107.pdf?index=true
    • https://47059870-53ad-4f0c-8b49-ac5bc10c2565.filesusr.com/ugd/217d68_73ca397110d44377824bc8558aa91c5c.pdf?index=true
    • https://f7b6b640-6162-487b-8155-1e1d178627cd.filesusr.com/ugd/7d21c0_38c0ac1775be485f94f1ee94a39bfc15.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676f.bin
512fbef7c2e0e090acbead21d97a12b5fb87626f0a1d752bde22a833bae18a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 4932 bytes
font_01_sfnt_off00007830.bin
9ca236568d57507897eeefb2483719a54e5b538d4106c36fe580cef69951eebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 10040 bytes
font_02_sfnt_off00009a6c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 4324 bytes

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