Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4322c1c7a460e5…

MALICIOUS

PDF

39.3 KB Created: 2020-08-20 20:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a78449525e9391fe88398a36d54da535 SHA-1: 2d513b3ec6820bebd23e1bc9d67ffd6285fee4c3 SHA-256: fb4322c1c7a460e50efd32e7f1973a74acf36f9b47e40353364a1361e8d42f28
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'gba emulator roms for android' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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://ttraff.ru/pify?keyword=gba+emulator+roms+for+android In PDF document text
    • http://files.lightonplaza.com/uploads/1/3/0/7/130775747/5855531.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/1/0433/9014/0583/files/19982351391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/51416252927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/best_guitar_books_for_self_teaching.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/58109124671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/63533074997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/bosud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2917/files/microsoft_leap_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2602/9463/files/jijinixigawigekulageze.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_off00005bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 5224 bytes
SHA-256: a1aa7ee2184787a2f9b503304e6d08945f5d9b4fe9d316a479a78a9029b70620
font_01_sfnt_off00006d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8D 10388 bytes
SHA-256: a4ac8035cec61dbf25ca723af6240865f5893839268921ac3f64a5c43d253d71

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