Malicious PDF — malware analysis report

Static analysis result for SHA-256 73085ba46a88c13a…

MALICIOUS

PDF

56.1 KB Created: 2020-07-29 13:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: caed2cba88b4c077b20835c22968f578 SHA-1: c749cbdbe441ae2f9e68e80bdf83ba1f4f950663 SHA-256: 73085ba46a88c13aef97eeae9a2daed0e0825ad3591f2b68ae99c290ddf1a21b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Bucket steam trap pdf'. The presence of many external PDF links points towards an SEO link farm or similar manipulation tactic to drive traffic to malicious sites.

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=bucket+steam+trap+pdf In PDF document text
    • http://files.atousaraissyan.com/uploads/1/3/0/7/130740563/wofore-kuruvuxajekadel-puposurubag.pdfIn PDF document text
    • http://files.pvtennisclub.com/uploads/1/3/2/8/132815737/9502373.pdfIn PDF document text
    • http://files.naturebajuicebar.com/uploads/1/3/0/7/130776567/4699531.pdfIn PDF document text
    • http://www.opentle.orgIn 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/1/0434/3015/0300/files/15064715960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/dojulusezakupetewiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/xegeximafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/94641699953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/99615596416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/rowizoxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/ponelogokujodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/86243786404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6984/9246/files/jobaxidexabasopoduwunow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/fepapopugefomisajut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/9908051224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/wabajalexib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4679/files/4430880956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/xutozi.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00008434.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8434 13260 bytes
SHA-256: b8d550a221c094efefd8dd813d9cd4d4765ea400db944e05cc39d3530a0204f6
font_00_sfnt_off00007339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 5000 bytes
SHA-256: a4b14174543e3c6150ce0da4ee8f0ccc40cbe4a782a25a710838b5a9bc11ae5e
font_02_sfnt_off0000a9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DF 12928 bytes
SHA-256: 50688d9522c8e8f8e64cb08146f58cfe0f51a2cd4d0bf8d2358ebf834d565066