Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aac71ac4c8cc32c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-31 17:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27e098e81bf0f3083a8881d028f6bc03 SHA-1: f60e10bcd524277877e57947cb8f46764d516380 SHA-256: 5aac71ac4c8cc32c5ba690e41237f3eb5d819b7cd5a51984e1647e8a6a49afa1
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL identified is https://ttraff.ru/wix?keyword=bhakti+bhajan++karo. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to lead users to malicious content, likely for phishing or malware distribution.

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.ru/wix?keyword=bhakti+bhajan++karo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/0465/5773/files/54758085836.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/toraladomokipina.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/luwokemok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0561/files/soil_strength_and_slope_stability_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/wapipazopetukazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/nuxadomego.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/76673797742.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/81408165856.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/ares_and_hera.pdf
    • https://cdn.shopify.com/s/files/1/0438/3146/0002/files/sukanu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1046/files/29032848654.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/onn_mini_stereo_system.pdf
    • https://cdn.shopify.com/s/files/1/0438/7838/3771/files/minecraft_server_unable_to_access_jarfile.pdf
    • https://static.usrfiles.com/ugd/b8c837_54ca766becbf4c6a875aafae1caee49b.pdf
    • https://static.usrfiles.com/ugd/d3758e_b5d3b28ead4d45cda12378d27a5ddd69.pdf
    • https://static.usrfiles.com/ugd/d1d005_145bbac77cc048f691c1019b97f7afcd.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e8d.bin
e4a67bf45d0709e897ed573e5564b24adebab8cf4be9bf560bf42de3cfcab64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8D 4892 bytes
font_01_sfnt_off00005f2e.bin
eb903a4bcabb0673128613fc2c6a3b3be6b6be0204d11159aa2f590e1d82ee93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 3740 bytes
font_02_sfnt_off00006aa7.bin
9c4571e26c8e2e4c88cf584742fa7ab75fc19364c5277556dbe2c7feef9d30df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA7 11016 bytes
font_03_sfnt_off00008f36.bin
088a0d69d07b79736564770f5959aae9b9507bd6d6fd797e4a30f22cfd27d327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F36 5484 bytes

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