Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a873f5f96da33e…

MALICIOUS

PDF

34.5 KB Created: 2020-09-19 05:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62f25b583cc9cb7a03d8eb00699836bd SHA-1: 5085fc1eb347c647626c889ea9c68a17535088bc SHA-256: 04a873f5f96da33ed38152a844900eeba45ca8b15406e666d8cf4cb2d88525b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically targeting search queries related to local businesses. The primary malicious URL identified is https://ttraff.me/wix. This technique is often used to drive traffic to phishing sites or malware distribution points. No scripts were extracted, and the document body was heavily obfuscated.

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=park+athletic+supply+allen+park+michigan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ed9429d8-61e2-4489-9ac0-201fe9c96daf.filesusr.com/ugd/4c3ae3_1b03933f08534c4fb3f14d81dd386513.pdf?index=true
    • https://63a9071e-f24e-4e32-8bd1-9b745809c1f0.filesusr.com/ugd/6c8f37_3c3b0780e84347aab3ff04d7b475610d.pdf?index=true
    • https://4fd37c2a-fbd5-4e4a-b8be-efb1186c0e1d.filesusr.com/ugd/10a4aa_f2f2c74f109d4ee695e2a6ad9e9e7113.pdf?index=true
    • https://543db68e-3a9c-469c-b0f9-33fd439df51a.filesusr.com/ugd/a1fb72_5a1c0bcf0bc04f6dafdaa830534afb12.pdf?index=true
    • https://64203820-af23-4679-8101-43190f853d24.filesusr.com/ugd/bf0735_a4e4a0db170049f78387d1a8426b0745.pdf?index=true
    • https://fb17260e-fe31-47ec-879b-3dfbf463d946.filesusr.com/ugd/3fd21f_c68cc42380a54124bd35477148717797.pdf?index=true
    • https://1bddc661-5558-4f7d-8520-392b7dea355d.filesusr.com/ugd/6812d7_94e43eb6f9164f15b9983f1b349fa8ce.pdf?index=true
    • https://92fab142-7858-4060-a330-6177cb51f483.filesusr.com/ugd/822ecd_2f02e6a4cd564ccc9b9b2b6f273aa541.pdf?index=true
    • https://2ccda76a-8306-4002-aea7-31b46dc8d714.filesusr.com/ugd/1da05d_60bea33e345e4972b8c8d10c098c7375.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/55551378206.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/vivefaxupulagezeduwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/sexewin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/jagemimavomotobaxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/wejum.pdf
    • https://cdn.shopify.com/s/files/1/0465/8082/6279/files/pupiwemekotisuzif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/wotifojod.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_off00004815.bin
22e5e5ccac382d5fd9c1d231364328c23be8ed7d71063e9ad518d73e219a1c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4815 5512 bytes
font_01_sfnt_off00005ab6.bin
1ae1317155cfeec0eeea0d9cda8d7749f2957fd70c15c7729696519476096932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 10028 bytes

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