Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c59afbbd113482a…

MALICIOUS

PDF

55.8 KB Created: 2020-08-19 13:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 166b3b58b6fe6b3576b2c6c6acc0c7fd SHA-1: c3a925db52b9d6d5910ff29c88cd2898e5841bb6 SHA-256: 8c59afbbd113482a46cd1880c87bbfcb55b2faedbae016a01ea2377957c73c3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but the primary malicious link directs to 'ttraff.ru'. This redirector is associated with a lure for 'vmware workstation 12 pro with key', suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the document body and heuristics indicate a social engineering lure to a malicious URL.

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/pify?keyword=vmware+workstation+12+pro++with+key
    • http://nupumebij.burghyart.com/uploads/1/3/0/8/130813612/29af5911d98aae.pdf
    • http://files.englishestateservices.com/uploads/1/3/1/4/131454719/b6a13.pdf
    • http://files.uppmusic.org/uploads/1/3/1/3/131398008/dolasu_xifikijezi_momifanave_kojin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/genilopok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/tilapomuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/large_fleur_de_lis_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/23140297992.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/31942795589.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/small_bowel_obstruction_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/83348131774.pdf
    • https://cdn.shopify.com/s/files/1/0448/2190/5570/files/xadusuxojelepapavisavep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/amazon_fresh_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/kageman.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/axis_and_allies_1940_global_map.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006802.bin
7d92ab45aa3cb6dccc692da9cb64eec2c45fab3132e672ff9ab49f3e4d34c852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6802 9308 bytes
font_01_sfnt_off00008686.bin
a06d90a2ceac2c816178e6a62f89b823da541cfb25fb80c1e84a51ef5dbcb81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 5220 bytes
font_02_sfnt_off0000982e.bin
eca4c2d5b8428ad2de88eaa2f4d8feb980c3bbbbc95ffc9947855b06fbc8bcdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982E 14048 bytes
font_03_sfnt_off0000c3b0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B0 4324 bytes

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