Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a5d2ff6f98a631…

MALICIOUS

PDF

34.7 KB Created: 2020-09-18 16:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78d08d2b8b149282730ef6d5e2ba43fc SHA-1: 32e53b8e5c29036b05bad351cfe136ba20f394b1 SHA-256: a9a5d2ff6f98a63148d077fe5291a3bb5e72da4a0f6d08fd9bb5f86a22a9b852
194 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate that this PDF is designed as a link farm, likely to distribute malware or facilitate phishing. The primary malicious IOC is the redirector URL, which is used to obscure the final destination.

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.link/wix?keyword=steven+universe+art+book+pdf In PDF document text
    • http://files.sbafootball.org/uploads/1/3/0/7/130775659/sadopus.pdfIn PDF document text
    • http://gewokali.riverfrontroyale.com/uploads/1/3/1/3/131398367/timogatosaj_milosu_vazekupiviruro.pdfIn PDF document text
    • http://kojofu.mediocreatbest.net/uploads/1/3/0/7/130775593/d1049.pdfIn PDF document text
    • http://files.sdstudiovivo.com/uploads/1/3/1/3/131379552/3432862.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/1/0437/7860/5218/files/kaplan_step_2_cs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/cd_burner_windows_7_64_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/ssh_config_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/xevowidevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8392/2585/files/how_to_turn_on_my_tcl_roku_tv_without_remote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8619/9461/files/pc_building_simulator_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7311/8884/files/732859359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/23268562455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/kiwabuxiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1617/4998/files/brother_dcp-_l2540dw_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/8144983711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/zivanurewegifigijides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2906/5639/files/wofisurosowatanejemufifo.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 4

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_off00004a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A07 5368 bytes
SHA-256: 16f0b87c47654cecfa2cb7c242337111bdcd5ce623184bf1cee2dc9c142c73d8
font_01_sfnt_off00005c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5C 9712 bytes
SHA-256: dafc7684afa0ee9bbb61173e65bbf44444fdf48ad700fba90156b397e48d48d0

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