Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fb00edf9e97a13…

MALICIOUS

PDF

46.4 KB Created: 2020-08-24 17:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f8c5c380710ce6264fbab8f70bd7b8 SHA-1: 0f4fd77757b9418d1d1ed2d609d1dc09cb16e0a4 SHA-256: 14fb00edf9e97a1363174b56da0639834e32eaca0ad724eded940fb7e316ac92
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the presence of malicious links is sufficient evidence for this assessment.

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.ru/pify?keyword=carrom+disc+pool++app
    • http://terije.mollysteinwald.com/uploads/1/3/0/7/130738721/fapemakun.pdf
    • http://kumorusa.ams-florida.com/uploads/1/3/0/8/130873877/3a82d2d24e7367.pdf
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/10464159756.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/gejotifeme.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/ff12_zodiac_age_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/mine_wars_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/33602085068.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/78420095479.pdf
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/gimijapinatabetazonodex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/70424169365.pdf
    • https://cdn.shopify.com/s/files/1/0445/6490/6148/files/60677338523.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/zosekiduniwoninisolafu.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5096/files/cirrosis_hepatica_alcoholica.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005220.bin
a9ebdf1b080961b959f9d8ed9355e562cbd63633cb47363bad51252259be8c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5220 5124 bytes
font_01_sfnt_off0000636d.bin
aa94f94a49f7cc69be897c53d6999420cccd1457bfdc2ebe02ea749ca160b544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 3736 bytes
font_02_sfnt_off00007242.bin
d4f4ddaabd401538f061113b6994e1e2029ea09f4ddcdd861b9396f245822155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 10520 bytes
font_03_sfnt_off00009665.bin
999f5b9e24082751e36bf8ce3efc51544f279e2159ab1ce8ad035bddbbd64011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9665 16348 bytes

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