Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb89125db4673ab…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 12:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c796ea661122f3f0497f7feedefc98a SHA-1: 6276d6626c67dc24d1bff42b677fafc883aeefef SHA-256: 1fb89125db4673ab5fd45497664be0b33afd294ed4552d350ef452fb9b9fec1f
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The embedded document body text, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing.

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=heidelberg+cement+bangladesh+limited+annual+report In PDF document text
    • http://files.poteetchoir.com/uploads/1/3/1/3/131381519/9bfea46537a.pdfIn PDF document text
    • http://gafok.falconandhawke.com/uploads/1/3/0/8/130814328/nudamotifewi.pdfIn PDF document text
    • http://files.dj-dogtraining.co.uk/uploads/1/3/1/4/131407281/5d8d7311f.pdfIn PDF document text
    • http://files.mbagolf.org/uploads/1/3/2/6/132681164/fizifiditumibe-gerin-bolijatejovefo-bawuzikimaxamiw.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/1/0429/5242/5631/files/tamudixajibeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/stadtplan_basel_altstadt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/buwegufab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/puzawujiriwote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/43346559316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/fokolijozuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/bull_float_harbor_freight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/jirijuxewugajugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/maternity_leave_letter_in_kannada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/mabuzejijag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/bimusosopexipugugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/23844091002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/rmit_university_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/13467710671.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_off00005344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 5472 bytes
SHA-256: 9e824ea1aee54d9a3b6f7d24d9ce06645165a094634be4398ae0974bdb38ba74
font_01_sfnt_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 10096 bytes
SHA-256: 383068996c2ca9da67556bf0ca90b8c3035372cffc09af7f75b6381da1989935
font_02_sfnt_off00008800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8800 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e