Malicious PDF — malware analysis report

Static analysis result for SHA-256 b623cfd074fb7a86…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 10:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfba4fed6453475d178b589faeaf9dbf SHA-1: fd426069be47f114667ef3551b9c69c1388731a7 SHA-256: b623cfd074fb7a86a941b65698015be1562c8a48601c921f2f30856bac2ec8d9
150 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 Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=chromogenic+substrate+coliform+test
    • http://dedurevuv.nekimastrategies.com/uploads/1/3/2/6/132695569/6d50e2684f897e0.pdf
    • http://files.bethmaries.com/uploads/1/3/2/6/132682585/todanubo.pdf
    • http://files.cherokeerosehandcraftedsoaps.com/uploads/1/3/0/8/130814200/faa3af8daaf.pdf
    • http://xozijigos.thesacredyes.com/uploads/1/3/1/0/131070420/kuseki_wujeputawit_kekupivexikax.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/kowujur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/frank_s_hospital_workshop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/12408402831.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/zumamiwogibovavaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/perojelakekefobogixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/43374485916.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/95632558675.pdf
    • https://cdn.shopify.com/s/files/1/0436/0100/2664/files/22977550365.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/discord_dating_servers_under_18.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/dapowulokuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/53814193128.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/lupijiginuxijav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/nolokuvexerokunikojupe.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_off000060c4.bin
abb526d9999a1142408ca223762efb847f8b3026339decbd3cebebaf017f8779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C4 5340 bytes
font_01_sfnt_off000072cc.bin
6a5d59cc109343aba2dce3111fc0851a5598f127d660a13f2be4928d34b653bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 10092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.