Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4d3b344e0a0d17…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 01:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54223c533e91f9f136b829cf81c2e717 SHA-1: 5e7d6f708fad1dcf884d5f0fb73c62c71d2dfecd SHA-256: fb4d3b344e0a0d172385cedf29919e2fc76db3e038ff4a96776ccaa1703fc023
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=types+of+chemical+reactions+worksheet+key. The document body text, though partially corrupted, contains the same URL, suggesting a lure to a malicious site. The presence of numerous links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=types+of+chemical+reactions+worksheet+key
    • http://files.shanesimaginenation.org/uploads/1/3/1/6/131607522/a9ec0c75.pdf
    • http://files.demusproductions.org/uploads/1/3/1/6/131637679/6666b6e7c9b6a6.pdf
    • http://files.pillowellsilverband.com/uploads/1/3/2/6/132681985/6294044.pdf
    • http://kejufifiw.windows8cardgames.com/uploads/1/3/1/6/131607240/9541941.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/tejodaredoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/94667182012.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/kurtulu_sava_ve_cepheler.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/pajererakovube.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/18695844222.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/firelink_shrine_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/sound_files_for_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0431/4438/0578/files/fevalinoxijogupele.pdf
    • https://cdn.shopify.com/s/files/1/0452/4739/8050/files/chinua_achebe_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/dojipemorov.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_off000065ad.bin
da0a7ee50aba61f7020281fe3d3d548aae5036fc4d73add57fa2d31d8c7edc4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 5464 bytes
font_01_sfnt_off0000783b.bin
5eb5d24494ab2b2abb35a089750d423e8874dcbdead13171034965deea924b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 9932 bytes

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