Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c22c3ea4683d036…

MALICIOUS

PDF

53.8 KB Created: 2020-08-07 10:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a88b22b86aadb322474560d7d3d69389 SHA-1: ac7e6d7464073e962c2240b9b79ce196f12727c6 SHA-256: 1c22c3ea4683d036e928c97693780a4190825ba380ed58de0d26440cf6249b84
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Archicad 21 user guide pdf' and the malicious URL, suggesting a lure to download or view a fake document. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt.

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.com/pify?keyword=archicad+21+user+guide+pdf In PDF document text
    • http://files.bollesrottweilers.com/uploads/1/3/2/8/132815752/c4b7c1c914.pdfIn PDF document text
    • http://files.xnews.blog/uploads/1/3/1/4/131482939/9535730.pdfIn PDF document text
    • http://files.nickcharlesmadson.com/uploads/1/3/1/3/131383434/00ff6614b9.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/1/0427/7121/8588/files/kimifizaxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/fepotaloju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/best_anime_ost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/waterikid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/bookmarking_pages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/fourth_normal_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/dukotobabulurexazixojuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/st_lucie_county_school_calendar_2016_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/29899843509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/20249468516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/wasisugarogajifapajigexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/54791599989.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
🗂 Part of campaign: masakoonodera.com 9 samples

Related samples 8

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_off0000955a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955A 5556 bytes
SHA-256: 8591a56da08311d5c3057ecd7233a9f236cff1cde147f561233938f259e48300
font_01_sfnt_off0000a843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA843 9876 bytes
SHA-256: 430c44d5db80dff240109fa253f0ae09c41235b34fcd4171b3c47fcd8222a0e6

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