Malicious PDF — malware analysis report

Static analysis result for SHA-256 851d1cf2572f08ba…

MALICIOUS

PDF

54.8 KB Created: 2020-08-05 06:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30877a914846820e4a60fe5b66e920df SHA-1: 97112b91fc325dc58443ccf81ba7c0a452f82715 SHA-256: 851d1cf2572f08ba4114e87813da7611614475b67aedae0d0e2f9622b33c16f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to an SEO redirector, specifically `https://ttraff.com/pify?keyword=equation+of+motion+class+9+pdf`, which is flagged as malicious. This indicates a phishing or scam attempt, likely to trick users into downloading further malware or visiting a malicious site under the guise of a document. The ML classifier strongly supports the malicious nature of this PDF.

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=equation+of+motion+class+9+pdf In PDF document text
    • http://files.anchorseminary.org/uploads/1/3/1/8/131871466/nefegutobus.pdfIn PDF document text
    • http://files.kalaitzakisdesigns.com.au/uploads/1/3/1/3/131379789/bitagilotudoz_gujilixijew_tasopajorelakop_xomudobejev.pdfIn PDF document text
    • http://files.eugenias3rdstreet.com/uploads/1/3/0/7/130775934/mizaroreranin.pdfIn PDF document text
    • http://files.mtbreizen.nl/uploads/1/3/1/3/131383934/gifuza.pdfIn PDF document text
    • http://files.acupuncturequeenstown.com/uploads/1/3/1/4/131482954/jotujenigureb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/66521182960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/tamiwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/16916532653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/54577415955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/basizoxovolatowasurolab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/11351127942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/16468672627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/ansible_variable_precedence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/75608787221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/sezumirufavogepune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/47032554994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/59112293149.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 5208 bytes
SHA-256: ba03a5153406e069afe8e86442beb3a9178ab93e928ce2f009e1bfacff10935b
font_01_sfnt_off00009b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9C 10468 bytes
SHA-256: ab0ed70997b691862e7e3ad17a16f0dec15fae572b9869a158b75d29271e8387
font_02_sfnt_off0000bf85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF85 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34