Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d1be340ee6a4d1…

MALICIOUS

PDF

38.4 KB Created: 2020-10-31 10:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c543cea376ed1032cfbd8d697bb9b59c SHA-1: f80f48de837b211bea6e1bf06fd7334bd7a2a6e9 SHA-256: 27d1be340ee6a4d1bb6e7bd06992ff8c2889023c069ccb0e04f9a8989f0d2440
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to a redirector URL associated with malicious activity. The document's content and structure suggest an attempt to manipulate search engine results or engage in phishing by presenting a seemingly innocuous topic ("Harbor freight bakersfield store hours") and linking to a large number of external PDF files. The ML classifier also 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://ggtraff.ru/pify?keyword=harbor+freight+bakersfield+store+hours In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb5bb13-c6d5-4dd2-bdea-6be4e6dd0979/d_link_dir_868l_optimum.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/22688977731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b09a76e-021b-4209-9db1-af7e087ececb/xoziwefelakafagakojodo.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/18909747063.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/story_of_o_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/auld_lang_syne_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099e8f37-fe51-42ea-9f03-5f3218a5a02e/5276433479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4597/5729/files/soruxusijofaminuwepap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8391/3147/files/92903206785.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/35788119398.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/85762613925.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/43612709105.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/laxamup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5430 5336 bytes
SHA-256: 1960f04724a8611f2b75a5b98b921d4577ba35e97c2447bef954837c402d0273
font_01_sfnt_off00006649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 11848 bytes
SHA-256: 70626b5a912a1c81cd79f59d72bedd9096bd2a868a952c4d6ded889254a4eb72

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