Malicious PDF — malware analysis report

Static analysis result for SHA-256 91291e134b592964…

MALICIOUS

PDF

48.7 KB Created: 2020-08-14 02:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f91fcef557738d912a601e05aca610ce SHA-1: f533c2fef66f6ef9f3aed1ad7d7123dc61b94199 SHA-256: 91291e134b5929645a38581d7ebfc645dc573c185769616e8a95133dc828952d
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a strategy guide. The document also features a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead the user to harmful 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.
  • 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.com/pify?keyword=horizon+zero+dawn+strategy+guide+pdf In PDF document text
    • http://files.andrewfcartertraining.com/uploads/1/3/0/7/130739601/bavevu_padiwejazin.pdfIn PDF document text
    • http://files.libbyfife.com/uploads/1/3/0/7/130776500/7021962.pdfIn PDF document text
    • http://wasebokir.shannoncangey.com/uploads/1/3/2/6/132695663/7c6100c2ffe.pdfIn PDF document text
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/27469600392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/java_mcqs_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/19492926301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/95454832343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/el_modelo_de_calidad_total_mercadona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/lirududevaroleniwiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9064/1047/files/xevojesaxekerovosesum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/wuzalulugotaminixototu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/26825335385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/81285260145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/tarkov_flipping_monitor.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_off000080cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CF 5384 bytes
SHA-256: 19f29efa712d3a677d74a610c03753ce90c4131a755f1a216f35ff0ce6a2feb1
font_01_sfnt_off00009349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9349 10084 bytes
SHA-256: 46008894446aa226a1520249d0155023e9491ce7c2a9814c41a9847f1a2f98a9

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