Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81b66dd3a969aa2…

MALICIOUS

PDF

56.2 KB Created: 2020-08-08 09:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7417019cc1911fbb55efcb245c033052 SHA-1: 2df0444f90e4ab5c25a9b4ec4fab4d8112112db9 SHA-256: e81b66dd3a969aa25d6ca6b4a699e9ad0b299ff3af923d1c8b97a0547f2266e5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though partially corrupted, contains the target URL, reinforcing the malicious intent. No scripts were extracted, limiting the analysis to the PDF structure and embedded URLs.

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=al+mughni+ibn+qudamah+pdf+urdu In PDF document text
    • http://files.gem-uk-properties.com/uploads/1/3/1/4/131453902/jarobefizojovit_zogibemakemix_jatutaxoka_fijonanax.pdfIn PDF document text
    • http://files.lamarvetclinic.com/uploads/1/3/2/6/132681632/9962216.pdfIn PDF document text
    • http://dopud.springfieldmabouncehouserentals.com/uploads/1/3/1/4/131483281/5074170.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/1/0430/8549/6482/files/bakuliwowekoxiwitepuluwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5700/5222/files/93659491738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/guitar_rig_5_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/67387514475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/didagikegiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/solubilities_of_inorganic_and_organic_compounds_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9181/1734/files/92400754750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/96361968595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/caligrama_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/getowezemonowup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7589/4422/files/roxanafopizizexoganafip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/rivixe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000ac9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAC9C 22544 bytes
SHA-256: a7801f3c68861904479a7c3d0c04d78f83a233e699d70f4952381e010d356a5b
font_00_sfnt_off00007669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7669 5532 bytes
SHA-256: b97aae3b9d7ad5ce96dc7fa7aa8eb7a4ad930d018d16efb373112f6f2e3e7fbb
font_01_sfnt_off000088fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 10368 bytes
SHA-256: e6304ce0fa621ad2f9e7a68429ee7b1d6117f2b1d155f0eea021fd314a0cce1c