Malicious PDF — malware analysis report

Static analysis result for SHA-256 d985060c6c53bce0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 09:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3117845cd4b6f928c89d5a84fdf52f69 SHA-1: 7333840d812240ae7ff18bfd4e0b79b4afbd8110 SHA-256: d985060c6c53bce03dbe060831e70ee572fd6dc81fdbf0c4cc20531e8fc5243a
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into clicking through to further malicious content. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a phishing or scam attempt. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm SEO tactic to improve search engine ranking for malicious content.

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=centrifugal+pump+design+pdf
    • http://tubom.mintzathletics.com/uploads/1/3/0/8/130813834/xikududususag_jitid_tizanowubi.pdf
    • http://files.hillarytrailadventures.co.nz/uploads/1/3/1/6/131636946/1473492.pdf
    • http://gedak.sayrevillesquad.org/uploads/1/3/1/6/131636725/1116774.pdf
    • http://files.chartierpropertymgmt.com/uploads/1/3/1/3/131379213/44b39d2ebad1.pdf
    • http://files.columbianacoc.com/uploads/1/3/1/6/131637163/8c35b74b.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/kadambini_magazine_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/full_form_of_all_network_protocols.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/31346094377.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/75696776666.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/st_louis_coptalk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/vojapakupudananew.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/sda_hymnal_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/homefinders_guide_lake_charles.pdf
    • https://cdn.shopify.com/s/files/1/0440/8839/3893/files/kezemolog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/taforinejijobuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/active_and_passive_voice_examples.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a84.bin
14129a56cab16cb1398bb2ffa95d8909de22e15ed6dd00de3b09bc73d4ddd27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A84 5268 bytes
font_01_sfnt_off00007c56.bin
a6c903570a21a22ca38db1e7a16b1a98ceb80d967ac25d3891b7ad40a996c703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C56 10116 bytes

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