Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac81dcc2b9bab77…

MALICIOUS

PDF

60.4 KB Created: 2020-08-01 00:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea86b9d8c79e05ba37231bf7891554f1 SHA-1: 6e3aeadc495973812ccefcd3093d253f4a5073bd SHA-256: 8ac81dcc2b9bab773491714fe6fc72e6a28858a437974103bae84446224eda28
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on ttraff.com. This infrastructure is known for redirecting users to malicious sites. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through a link farm to a potentially malicious destination.

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=d%2526+d+3.+5+book+pdf In PDF document text
    • http://files.woodrabbitstudios.com/uploads/1/3/0/8/130874642/eec8d46e749.pdfIn PDF document text
    • http://files.photographybyreneejones.com/uploads/1/3/1/4/131407274/tevovivumakojur.pdfIn PDF document text
    • http://files.rubiis.com/uploads/1/3/2/6/132681352/fugewefuzusow.pdfIn PDF document text
    • http://files.sheppardinternational.net/uploads/1/3/1/3/131380008/wevexada_mutezolojow.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/1/0433/5638/9528/files/vaxinigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/zodijikumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/ganujopoxawuwosasasekak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/engineering_economic_analysis_12th_edition_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9216/3227/files/76906672518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/vumibufejodebaladamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/gujedirevuvumasiguzofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/loxivuzaravepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/9000290812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/22353969235.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 4156 bytes
SHA-256: 4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879
font_01_sfnt_off0000796a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 37772 bytes
SHA-256: 8af5ce86175981b7b03b470f9b3ad040fd40be71b0aebee4678fe11778dd1697
font_02_sfnt_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 17784 bytes
SHA-256: 5a32361a6d9f2f1af0eb2f45d63e70e8a99d8e76b1ffe594ee650d67d027cd13

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