Malicious PDF — malware analysis report

Static analysis result for SHA-256 514f1df003117970…

MALICIOUS

PDF

41.3 KB Created: 2020-08-04 07:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d73d4e39409ecaee0f0f173a9016cdf4 SHA-1: e27497782d11d841c58c5c1fe75f37dfab1153b6 SHA-256: 514f1df00311797090da71b007800aad69ebefeb5b592850652cf984e7a46a60
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.cc/pify?keyword=converting+kindle+content+to+pdf. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=converting+kindle+content+to+pdf
    • http://files.stromsmoeherefordandangus.com/uploads/1/3/1/4/131437886/videw_gobuvo_zotex_detorufoduw.pdf
    • http://files.mrsothomascookies.com/uploads/1/3/1/4/131452988/dozogodozobunokawun.pdf
    • http://files.pldogwalking.nyc/uploads/1/3/0/8/130814208/gilovikogimoro.pdf
    • http://files.ksasteel.com/uploads/1/3/0/7/130739525/wuruvinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/1080451186.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/53302325959.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/novafezumenolavapufijap.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/lodakesulupamibeziti.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/89007225716.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/28190679642.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/40924566433.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/sizazukonoluzumazoxol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/fojokakosodakuwazonewero.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/davubozidikatefofufep.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/engineering_graphics_essentials.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006578.bin
65e552c5eeb201043d4c684403f01871cb84b96a6c9ab4dfd8a4f34f4a7ba32b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 4964 bytes
font_01_sfnt_off0000767d.bin
78205cd84e5eb8c4682bcc588c2b4bbfb3d8ffce2b17fadd046b3d290f3a549a
pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10012 bytes