Malicious PDF — malware analysis report

Static analysis result for SHA-256 b617869a81e93986…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 10:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93facbc246aea248126e5cadb54a7b00 SHA-1: 121b2be5e3b28ae7f4d50265ef47429f5255ff0a SHA-256: b617869a81e93986bf22836e5dc59c562103ae443322e9fa71c92bf773b08574
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to file conversion and includes the malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious URL is https://ttraff.ru/pify?keyword=convert+corel+x6+to+pdf+online, which is likely used to redirect the user to a malicious site or initiate a download.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+corel+x6+to+pdf+online
    • http://files.lrse-nd.org/uploads/1/3/0/8/130814235/3159325.pdf
    • https://cdn.shopify.com/s/files/1/0435/0282/9734/files/49547742941.pdf
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/jerimozolamapubepotaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/8741/0840/files/76424401621.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/tatipujoxogisapuka.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/25757386029.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/16894792136.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/mafuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/lolokuxerov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/rurunonigenezuviguberufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2645/files/16455781297.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/google_docs_to_word_converter.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_off00005ba3.bin
883c8fcdd4bbd4fb1b0a810c4a845460d7d78233daa75d9ab17b885f575bc38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 4948 bytes
font_01_sfnt_off00006c96.bin
64fa511a91da31d2075b857141eebf2607e09c1002b2a5430617c049a3f250d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C96 10128 bytes

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