Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1313d81e7a9cf2…

MALICIOUS

PDF

45.5 KB Created: 2020-08-01 10:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bada1b5398d66438b777d9e24131697 SHA-1: 618b60c7debd5e21130da77e1b7d6594e3db204f SHA-256: cf1313d81e7a9cf2ebad392460830941b3dabf6e7bbe33a469528d7ba7052072
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=weather+and+climate+worksheets+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic to increase visibility.

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=weather+and+climate+worksheets+pdf In PDF document text
    • http://files.axishawaiiarchery.com/uploads/1/3/1/4/131406714/316b4549.pdfIn PDF document text
    • http://files.melips.com/uploads/1/3/0/7/130775347/saramigof.pdfIn PDF document text
    • http://files.chacotravel.com/uploads/1/3/0/7/130738607/xisimiloripij.pdfIn PDF document text
    • http://files.chlaudit.com/uploads/1/3/1/4/131437474/lugodelax-rawolobusore-rusinonolemumev-vonaforu.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/1/0429/3469/8147/files/4271744429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/zabalazilozodex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/21846696979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/79515302323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/fasubafagulosamajetipobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/lojusozovadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/dinugamawuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/2376632705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7897/5639/files/joves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2932/3158/files/desus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/61527532211.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_off00007143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7143 5564 bytes
SHA-256: a1a461d50a759b2051c8ce7e51d8fd7283459222b8c8b82047e736bae4881555
font_01_sfnt_off00008422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 10692 bytes
SHA-256: cbcf63a9fc44c14e73d604dff7b7bc92f4823352acb5eb60f65602faef07e86f

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