Malicious PDF — malware analysis report

Static analysis result for SHA-256 b391f1bfff8a22d2…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 13:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ef03ce6baec1355b1b91a409e30d66e SHA-1: 811e6a1d4ad1496d7f3ae95c403baeed50593bb1 SHA-256: b391f1bfff8a22d285b8386107e5b175e12ff55bf88a56796d0390d906eec0a7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to external PDFs, a technique often used for SEO poisoning or to obscure malicious redirects. The primary malicious link, https://ttraff.cc/pify?keyword=manuale+di+biblioteconomia+pdf, is identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for a PDF document.

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/pify?keyword=manuale+di+biblioteconomia+pdf In PDF document text
    • http://files.olgaflamenco.com/uploads/1/3/0/7/130740524/baromixagiz_saritebilorizo_zinijep.pdfIn PDF document text
    • http://files.centroashe.org/uploads/1/3/2/6/132681513/e4924844.pdfIn PDF document text
    • http://files.hccvermillion.org/uploads/1/3/1/3/131397927/baniladesokadag.pdfIn PDF document text
    • http://files.simplyinspiredrentals.ca/uploads/1/3/1/8/131856326/xerutejuzi_wovufakefakur.pdfIn PDF document text
    • http://files.vielka.com/uploads/1/3/0/7/130776327/dolezoxitukugas_furiwonufu.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/1/0431/8186/7176/files/7028357036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/15248673890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/retigijuxawalolipenolovaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/59698206296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/33437414968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/discord_friend_server_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/surone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/vijipojaredetobimej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/sepufad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/27638517895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/toyota_corolla_automatic_transmission_service_manual.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_off0000708d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 5172 bytes
SHA-256: 72f6c761cfebf645a8188de1ced25dac2808dfe5cd02ec5639d1fd6e42fb5243
font_01_sfnt_off00008224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 11336 bytes
SHA-256: ac0cfd16f472c2c6add6230eedc0cd968cb98a6acfc984b32053d34bf59c1c5a

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