Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f91ae8d60afc316…

MALICIOUS

PDF

41.5 KB Created: 2020-08-14 02:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 144da4b203789c731014bcbc5c9a17c6 SHA-1: ffdc51c5964c4fb49984a4794b4d92a4d37486f2 SHA-256: 5f91ae8d60afc316e425063ab15638b0f376cd473d279d19fd4ace31d46bdb24
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=too+enough+worksheet+doc', is identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lead users to potentially harmful content, likely as part of a phishing or scam campaign. The ML classifier also strongly flagged this PDF 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.ru/pify?keyword=too+enough+worksheet+doc In PDF document text
    • http://deduro.thacva.org/uploads/1/3/0/9/130969440/a5f488f.pdfIn PDF document text
    • http://files.jointventurephysiotherapy.com/uploads/1/3/0/7/130776821/vulefut_nezemobodikiza.pdfIn PDF document text
    • http://lowija.sthomaskensaltown.co.uk/uploads/1/3/0/8/130874277/labaxatiguve.pdfIn PDF document text
    • http://files.shootingstarbotanicals.org/uploads/1/3/0/8/130873855/9478650.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/1/0431/4929/5776/files/lopizowugelirunotowuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9014/4421/files/momotibaruderi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/mcr_mama_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/uniden_nascar_scanner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0568/6438/files/ganesha_atharvashirsha_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/45150210270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/lebuguwerudomamat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6373/7510/files/60937002163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4098/1670/files/44040320521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/business_process_improvement_toolbox_second_edition.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 6

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_off00006584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 5064 bytes
SHA-256: 2e076df72a6b068c10db5777bb64fcbcc0a3875e1d0736139f823727465e10ae
font_01_sfnt_off000076cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CD 10132 bytes
SHA-256: 36d7bebb254413b4ce89c7c7630e23233dff458705337eb7cc075f0f38b307be

Open this report in the interactive analyzer, or submit your own file for analysis.