Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d84c7af1d167380…

MALICIOUS

PDF

37.8 KB Created: 2020-08-19 03:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74450f97a9366dcd0e056e34aecb8aaa SHA-1: 0b4faefe988d690c1e200d70e9391a4f0bc327af SHA-256: 5d84c7af1d167380aa4e16779b099e4b74516b5f0c3237f2c0be0300bd576bf5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, many of which point to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=biogeochemical+cycles+webquest+phosphorus+cycle+answers', which is identified as a malicious redirector. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution.

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=biogeochemical+cycles+webquest+phosphorus+cycle+answers In PDF document text
    • http://files.fernando-guimaraes.com/uploads/1/3/2/6/132695915/piwelowor.pdfIn PDF document text
    • http://dorev.mwenya-uganda.org/uploads/1/3/2/7/132740449/f01c0271.pdfIn PDF document text
    • http://files.trinityclaremont.org/uploads/1/3/2/6/132681144/e5220a85.pdfIn PDF document text
    • http://zuseluful.woodworkingbeyond.com/uploads/1/3/1/3/131384635/7124040ac1c2.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/1/0430/0649/2823/files/mefudekonezaturanute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6294/2113/files/poparaxatorikede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/63096128401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/jefavoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/dukivebozagapusenewonane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/levofloxacino_750_mg_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6187/4583/files/7677807625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/josawivopog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/29687149336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/bulbul_bole_sun_babul_song.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 5

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_off00005380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5380 5856 bytes
SHA-256: ddc0a22e930738658d933186d6f976cccb36290f7be161d5635d02beada65c57
font_01_sfnt_off0000675a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 10148 bytes
SHA-256: 66e3b696553d4c4ac7873529578f1860f2b3285d4a5b60180d158f0228b7e7c6

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