Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dbbd4f5198a7bf…

MALICIOUS

PDF

41.2 KB Created: 2020-09-18 11:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee8e715b7ad7b47cb964b7ef80e4a81a SHA-1: d4e44d87bf2ecda02241c3c5bd2bb387678c3a56 SHA-256: 03dbbd4f5198a7bf788b13756bffa00d754568f26fa0634bb1f147466e5bfb87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific redirector URL, suggesting an attempt to direct users to malicious content. The presence of numerous external PDF links, including one to a known malicious redirector, indicates a strategy to obscure the final destination and potentially engage in SEO manipulation for malicious purposes. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

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=montgomery+ward+sewing+machine+manual+uht+j+1980
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7e357edc-41f2-449e-836b-5ba509df91c6.filesusr.com/ugd/384ea4_1f00a9ed615a4986ac5669b7ef2bd14a.pdf?index=true
    • https://c96bcc86-6ce6-4060-81a9-f9059c585388.filesusr.com/ugd/b90ba1_f5b7df04184a441c8c4dbf1f328d04e1.pdf?index=true
    • https://76ba23c4-93f1-42a5-8325-afbc3800d409.filesusr.com/ugd/7be1cd_0ae9cd072c8742d0a97c088d440caa36.pdf?index=true
    • https://6c1c9174-f30e-447a-9f52-599bfaa4d892.filesusr.com/ugd/38062a_a546c882b0764de59e4b5e364de70f62.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/5024949280.pdf
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/birmingham_barons_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/43407636239.pdf
    • https://9278dd6d-f8fc-4ac4-a210-33ab8bd072b2.filesusr.com/ugd/3f2390_c2c77516e7904673a70203c64f31586e.pdf?index=true
    • https://c01133a3-0f2e-4bf1-b017-2186c149241b.filesusr.com/ugd/622218_e511b9d8d6284f1a888cb542c27a86db.pdf?index=true
    • https://ce436494-cb4a-4d52-aa31-60f95c8e07d9.filesusr.com/ugd/035627_ff77fe004df04855bab803f4cb356844.pdf?index=true
    • https://d5ed2cdb-5fcb-4c39-9402-a7d7ab25d7a2.filesusr.com/ugd/73cb9e_99aaeb3b4a2640659a96b7d73df8ad96.pdf?index=true
    • https://c2c20907-8900-4c30-8fe3-9568e24a452f.filesusr.com/ugd/2486b5_6367b4d7f6464b51b6b919d98be2ac72.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/the_dilbert_principle_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/32697592698.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f86.bin
f2c2b8a723c589fe20af3c31ba96083e9d27dfd6340f8517f5964f1bf71ed07e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 6172 bytes
font_01_sfnt_off0000747f.bin
6e5c468b6884ec42549b2c5fe77bea87cd152be00a90c64810fa49ab71360d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747F 10232 bytes

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