Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f448cddb3bf8c6f…

MALICIOUS

PDF

38.1 KB Created: 2020-08-05 15:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ac77cb1f0ea8c5a51b4a005d60a937a SHA-1: 1db8a616a50217017ce035d2a1d2ab2ce304d59f SHA-256: 8f448cddb3bf8c6f0c6e106b207fedcebaa62859cd1a7e3ef6f8b401943faaa0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, indicating the primary intent is to lead the user to a harmful site. No scripts were extracted, limiting the analysis of further stages.

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.cc/pify?keyword=close+to+you+carpenters+piano+pdf In PDF document text
    • http://files.amyziserevents.com/uploads/1/3/1/8/131856270/2b8e1fc.pdfIn PDF document text
    • http://files.glasgowag.org/uploads/1/3/1/6/131636946/6612477.pdfIn PDF document text
    • http://files.benetvolleyball.org/uploads/1/3/1/8/131857115/1964443.pdfIn PDF document text
    • http://files.grittygoblingames.com/uploads/1/3/2/7/132712006/nibabonulunuvuvu.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/1/0433/5471/8358/files/wivirojem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/zonolepiwajojetomuvip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/86739509953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/96041688905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/weather_underground_south_lake_tahoe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/9573463478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/turojeviwejojagudiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/el_bullying_escolar_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/tokutivugiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/vunujabejamabutojipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/28406552326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3326/3253/files/89487748081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6613/7507/files/kenenajipaforiruzove.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_off000049b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 5156 bytes
SHA-256: 36b286b169ea8212dee37bacbb7e7a3db34b4d726acf864581982b5041fdf249
font_01_sfnt_off00005b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B56 9720 bytes
SHA-256: e0471e33480251bd70c81068c68e2ef5cb78e659744a96069b2140b9587bb809
font_02_sfnt_off00007cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3