Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c02bb3d58c782a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-04 21:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d41692ffd7671d266fded6bed2af1b2 SHA-1: d3b135a2014038bae4ea7504a2077a5d83eee3c6 SHA-256: 90c02bb3d58c782af1e56780149e69ac8d020958b20b7229401e70d2969c0386
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body also contains text suggesting a lure for a book download, and a heuristic indicates the presence of a visual download button. These factors combined suggest a phishing or malware distribution attempt.

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=cahills+vs+vespers+book+1+pdf+free+download
    • http://files.drdecks.com/uploads/1/3/0/7/130776031/felenuzugezaz_nuwodigesuz_werego_wunojev.pdf
    • http://files.elizabethdelormedesign.com/uploads/1/3/1/3/131381374/2080239.pdf
    • http://files.pdio.ca/uploads/1/3/0/8/130873822/raxip.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/27299310354.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/ayushman_bharat_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0439/1976/9755/files/rosetta_stone_spanish_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/fetew.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/74312236286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/67919756380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8791/1319/files/liwarofidotodegikaxuneki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/wivaborosexupodiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/sixinujunoloduxegik.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_off00006764.bin
1fbcd50ac6e195076bf993595721bea3031da87869e15bb497c7c3fdda553141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6764 5444 bytes
font_01_sfnt_off000079f0.bin
ddc1a9cbed9a0d7a7c04caf0fe0690919a856fdc13552a22176a667edba09010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 10096 bytes

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