Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f082368736350c3…

MALICIOUS

PDF

46.6 KB Created: 2020-08-18 20:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b44cffa588afbe39b9d427af6965234f SHA-1: ad7207db5e10bde104e6ea5a2d159b39d4d4864f SHA-256: 5f082368736350c34ee54b6d23a67ffe223fb50943e89bd916cbc3883486a331
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to look like a modding guide for "Baldur's Gate". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of numerous external links, some pointing to unknown or potentially malicious domains, strongly suggest a phishing or redirection attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document body and embedded URLs indicate a lure to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=baldur%2527+s+gate+enhanced+edition+modding+guide
    • http://vobab.bulbsoup.com/uploads/1/3/1/6/131636665/pogif.pdf
    • http://doneluvu.sdsimages.com/uploads/1/3/0/8/130874365/wegigaverepibivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/4516/2903/files/46966435114.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/88885427950.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/south_africa_hip_hop_instrumental.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2613/files/solar_battery_charger_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/gazeta_koha_jone.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/pofunaligisuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/dawufozesilokuwonofokiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/download_office_2010.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/kilizu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0730/9986/files/nimolekag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a8e.bin
e440fbc91e0f041a9d5e9314a34d81ab1a0fd0073b2682253c91d5d6e75d3ed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 3648 bytes
font_01_sfnt_off00007772.bin
7763f7f4af1205f7d432a9747677cbe78995b11a1dc2e6d8da0cc27fc61d1515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 5436 bytes
font_02_sfnt_off000089b3.bin
7a3c141ab6c22e89c3e67af65bc86a538bbe1b072d22f6246bfb80ccf31c5882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B3 10184 bytes

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