Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8787e067a3d455…

MALICIOUS

PDF

40.7 KB Created: 2020-07-15 20:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b36744451ce3224852ee4175e19e8c81 SHA-1: 5ce9a5df3eb12966cae75ad2b9d0644d1c72df2c SHA-256: 2b8787e067a3d455f0330d38395ce59a8fc7cbee68daa063582100ebbba30516
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Coyote grill manual', likely a lure. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, common in SEO poisoning or link farm abuse for traffic redirection. The ML classifier also strongly flagged this as malicious.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=coyote%20grill%20manual In PDF document text
    • http://files.flaptrapsart.com/uploads/1/3/2/3/132302998/c21c198.pdfIn PDF document text
    • http://files.driversedgrades.com/uploads/1/3/1/4/131454808/difopewaves.pdfIn PDF document text
    • http://files.lecharmantarts.com/uploads/1/3/1/3/131383318/poninenuxutig-xevinedapuju-duxazedokuvoxi.pdfIn PDF document text
    • http://files.19thholetravel.com/uploads/1/3/1/1/131164488/1683731.pdfIn PDF document text
    • http://files.bghsalumni.org/uploads/1/3/2/6/132681634/6078759.pdfIn PDF document text
    • http://files.lkoc.org/uploads/1/3/1/3/131383497/bofepowoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bageredo.files.wordpress.com/2020/07/56733785525.pdfIn PDF document text
    • https://xodowizewi.files.wordpress.com/2020/06/23918406822.pdfIn PDF document text
    • https://buparogemi.files.wordpress.com/2020/07/25872102579.pdfIn PDF document text
    • https://kikinanatus.files.wordpress.com/2020/07/gokirik.pdfIn PDF document text
    • https://reveposox.files.wordpress.com/2020/06/lenit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/nilajotomej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/batumeveroponanepofotiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/13118379741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4102/1349/files/47112875716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/70136869597.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 4832 bytes
SHA-256: 86e0dbb6d998d60c554f7804b0d8322b5f2861d43f38471e6ee24404e9344457
font_01_sfnt_off0000730e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 10160 bytes
SHA-256: 2be6e086318469cd667cc845ed369761785eb346ff5eb904ceb2fcf340d33f3e

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