Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb105dd42e18531…

MALICIOUS

PDF

35.6 KB Created: 2020-08-03 22:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14fcbc8b72eeed60d747c704a041c2b1 SHA-1: 142c201ea110ecab67152669a0d8139496d091b6 SHA-256: 1bb105dd42e185317cea5886c710d8b72c15e23866ce404ee4c1f41d7731f87c
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. It also exhibits a PDF link farm, embedding numerous external PDF links, with one specifically pointing to `https://ttraff.com/pify?keyword=benchmarking+pdf+libro`. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external content. No scripts were extracted from this sample.

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=benchmarking+pdf+libro In PDF document text
    • http://files.evolutionmeetings.org/uploads/1/3/0/8/130874598/mafax.pdfIn PDF document text
    • http://files.shsmusic.org/uploads/1/3/1/4/131453256/maxijekoxo-sababusexesi-xorizipijo-ganokamede.pdfIn PDF document text
    • http://files.troyelementaryspanish.com/uploads/1/3/1/8/131856904/setame.pdfIn PDF document text
    • http://files.thestudentscoop.com/uploads/1/3/1/4/131453395/tosomujim.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/1/0431/8052/3678/files/zomowibovugetujikijefati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/84219782241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/satirimasimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/lg_g3_unlock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/76069771169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/25220413382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/tatutakurajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/6765556976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/rosilazozerufine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/37182307015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3133/0969/files/83640988785.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 7

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_off00004c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C90 5644 bytes
SHA-256: 8a81098894d6b6a7c004630b4534d6a67bea2a4a898c4a66dbc37cd8e259b83f
font_01_sfnt_off00005f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F96 10408 bytes
SHA-256: c5823d62fa517320ef4964ac63de328fa975ecc6853221ea9757986b1581eeca

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