Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcbfdb9715a9419…

MALICIOUS

PDF

52.8 KB Created: 2020-08-07 19:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 307a0e1a0b766c91413442fe3cc80988 SHA-1: 7eff6efa9fd4553fdc5efdfe7c9bd2d367e480f9 SHA-256: 8dcbfdb9715a941903940d296c0400f13c3df14f33b1eb851b87218fe0b3485b
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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=angielski+czasy+tera%25C5%25BAniejsze+%25C4%2587wiczenia+pdf In PDF document text
    • http://files.genestewartrealestate.com/uploads/1/3/1/4/131482941/3491343.pdfIn PDF document text
    • http://files.meganhensonphotography.com/uploads/1/3/1/6/131606348/gabojiraxes.pdfIn PDF document text
    • http://files.yoursinfashion.com/uploads/1/3/1/3/131383283/josem_gujevebibi_bosixat.pdfIn PDF document text
    • http://jebot.tjihouse.org/uploads/1/3/0/7/130776791/lobiwez.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/1/0431/5093/4173/files/54502395126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15518423203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0642/7289/files/63523274797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/53907407573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/bescherelle_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/48101944362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/71568555654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/katufikemiwonisefojemajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/sadoduropujemavizifol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/kunovalomufudunupatum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/fexineberev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7434/5365/files/fizulavus.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 5908 bytes
SHA-256: bb785a34b91d201b5df1d256a4ce72f77fb5e836fa9eea6366705012c1e06ba9
font_01_sfnt_off00007d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 10296 bytes
SHA-256: 3ee75714655d7459a967abcc40ed44234675d6606b6ea5b999cebc0fda32f2c1
font_02_sfnt_off00009ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 11496 bytes
SHA-256: d45db68784c880c13daf7a3db050f2ab1fcbdb08405f07e45b4c6b2beec7f3f1