Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b08c58339b377c…

MALICIOUS

PDF

46.1 KB Created: 2020-09-04 19:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56f9de7784646dbdcc56ea14d01cf47a SHA-1: aae804192c69a953c40dd2ca52295dbecfa585f0 SHA-256: 10b08c58339b377c6c193b79a946d92d770e140183358f5131393ef38a89d6ad
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute content. One prominent URL, 'https://ttraff.me/wix?keyword=1st+birthday+invitation+templates+online', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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=1st+birthday+invitation+templates+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3852/3047/files/knowledge_matters_product_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/77868148532.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/89691640469.pdf
    • https://cdn.shopify.com/s/files/1/0435/6374/5441/files/17295329394.pdf
    • https://cdn.shopify.com/s/files/1/0439/5221/0088/files/jupipawabefexadepubiko.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/9373770428.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/sodifevogapuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/25960224803.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1199/files/vaccination_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/2616/9503/files/weider_ultimate_body_works_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/antibiogram_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/87435949405.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3062/files/airplay_mirroring_iphone_to_android.pdf
    • https://static.usrfiles.com/ugd/80bfa9_c6d9b5aeb0584b73b80a3d4c41481a45.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_3e2f6ab32bfb4157b61490db3b1e4260.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbb6e42560cb4eeca66c1ba5b356fa2b.pdf
    • https://static.usrfiles.com/ugd/455f95_1437a63ea5d44432945b8b37a9b527d5.pdf
    • https://static.usrfiles.com/ugd/8127dd_9d878f9b80ed4483a668a83f61605375.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f70.bin
61f2d7f9b3d80acd73b3c2c35be2e57b10901cd03026375523dbdcc4a5e08eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 5244 bytes
font_01_sfnt_off0000710d.bin
ffe85cbf15bc7522fe56ff55f60123d75dae404b6605b8b88d49a4f8b5f7cf6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 13744 bytes
font_02_sfnt_off00009c8c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8C 4324 bytes

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