Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fa1759097c64d8…

MALICIOUS

PDF

66.9 KB Created: 2020-08-07 13:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35eda3847f0f320d1544ea1a910d7c4c SHA-1: d09f63a7ab3613f83ca237fff2c7723899fb8552 SHA-256: b1fa1759097c64d88c5b0c20cb1caeaaea78e720cc695e4cbfa7c69be89ec689
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=antimicoticos+pdf+2020'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt.

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=antimicoticos+pdf+2020 In PDF document text
    • http://files.danesinaustralia.com/uploads/1/3/1/3/131379730/bb9c86f2d3.pdfIn PDF document text
    • http://files.tce-pta.org/uploads/1/3/0/7/130738710/bulat.pdfIn PDF document text
    • http://files.ironexpressltd.com/uploads/1/3/1/3/131381055/tunewijuxitu-wimatokefizibo.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/1/0428/8151/5673/files/27998485169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5233/5255/files/57574596341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/92496731131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/28393638532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/diwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/50428008275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/musesujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8548/7516/files/66542175097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8977/9106/files/budidaya_bayam_hijau.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/rapid_sequence_spinal_anaesthesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/75335680616.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
🗂 Part of campaign: danesinaustralia.com 3 samples

Related samples 2

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_off0000c952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC952 5228 bytes
SHA-256: cac95345ee3925091bb762cb977f27c0c7dfb22e0013efc22395ff8f5157fe5b
font_01_sfnt_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 10372 bytes
SHA-256: 8702b6415ae70e6ae7fd0cd52482dd198b8d1c2d1c2be2b50783c5520d3c2add

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