Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc6bf528e1707c7…

MALICIOUS

PDF

55.9 KB Created: 2020-08-28 04:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74310679553a1d91f740fb07302e93e2 SHA-1: eee81b7f598906a53f62cca66e447bda452a8c23 SHA-256: abc6bf528e1707c7a60084385e87c727fa44f84cf7bb5e0631ffca2f33c44891
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, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded links, 'https://ttraff.cc/pify?keyword=freenas+build+guide', is flagged as leading to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Freenas build guide', suggesting a lure to entice users to click the malicious link. The presence of numerous links, including benign ones hosted on Shopify, alongside the malicious redirector, indicates a sophisticated attempt to mask malicious activity.

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=freenas+build+guide In PDF document text
    • http://files.reishorerealty.com/uploads/1/3/1/4/131483153/rarumadakapojib_wupipobexe_zidemavifijo.pdfIn PDF document text
    • http://pozerom.shhschoir.org/uploads/1/3/1/1/131164250/tivuxegipige.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/1/0437/9544/7970/files/rational_fasting_challenge_hulse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/64044428792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/acrobat_star_show_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/24453665549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/70070992242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/24510397461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/hrithik_bike_racing_game_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/85818844977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/9158575604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/karateka_classic_apk_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/tadugojevazinakorumurirag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7093/2390/files/pre_kindergarten_phonics_worksheets.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 5088 bytes
SHA-256: 4c4e9559d3a82284ecb0f1acd61302e86f1c2fcb49480cae5fd436bdfe4d2ed6
font_01_sfnt_off0000ad71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD71 11016 bytes
SHA-256: 255d445bfed4a16e68990927c008fa46314a97a0509ebc36bc9bceb253d22ab8

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