Malicious PDF — malware analysis report

Static analysis result for SHA-256 13973cf7a3393892…

MALICIOUS

PDF

45.0 KB Created: 2020-08-09 00:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceb242ffc7679733fcceac13b7229b9b SHA-1: 54186d6081574993e2831b13afe6adb527ad4a3e SHA-256: 13973cf7a339389269a7b4d508747fc362739d9b92b98f44ef52493a323c8c61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources disguised as PDFs. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to lure users to malicious sites. The document body, though obfuscated, contains references to the same URLs, reinforcing the link farm and redirection attack pattern.

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=medicinal+uses+of+avocado+seed+pdf
    • http://regajite.dreamworldliterature.com/uploads/1/3/2/6/132682883/kizinoxepumu.pdf
    • http://files.domicilyachthotel.com/uploads/1/3/0/7/130775846/50a46b444.pdf
    • http://files.erikabrincat.com/uploads/1/3/2/6/132695200/d2f0ec.pdf
    • http://goxufu.lebaneseaustralianfriendship.com/uploads/1/3/0/9/130969060/c06182c67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/bawarezoxixukovoxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2176/0672/files/vemevisin.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/mosudiwomomerujogew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2238/files/suxomazorovesetawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/76324678247.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/fufazotuvujazapo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/rosefopizup.pdf
    • https://cdn.shopify.com/s/files/1/0438/2628/2658/files/edits_for_free_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/potassium_ferricyanide_msds.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/worship_music_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/arduino_ide_datasheet.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007262.bin
23e42d7b7e9a9b7d35201176a28eb6a0d126c3caa32bbc720b269f4df845b509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 5120 bytes
font_01_sfnt_off000083fc.bin
b7883fdb04e2895f27752991a35e10b20cbaf0857077960ec8f0b0e83660f1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FC 10300 bytes

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