Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34c2b74b73f1961…

MALICIOUS

PDF

44.6 KB Created: 2020-08-24 02:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 428bbbb446d6a26742b8cd4c31353d9c SHA-1: 6b135a98c274d160a2357a6cdfd37e469bc7615f SHA-256: f34c2b74b73f1961861a1b2209ec763741a827127a65785c42420409141609db
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary malicious IOC is the redirector URL.

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=chrysophyllum+oliviforme+satinleaf In PDF document text
    • http://files.couragechildprotection.com/uploads/1/3/0/8/130814714/a76c363172.pdfIn PDF document text
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdfIn PDF document text
    • http://files.stuartkraut.com/uploads/1/3/2/6/132681772/17329.pdfIn PDF document text
    • http://files.emmausny.com/uploads/1/3/0/7/130739891/gukedol_zofovomozefoto_wexalek_nawen.pdfIn PDF document text
    • http://tebivi.hayfieldsecondarychoirs.com/uploads/1/3/0/7/130775506/38c26b27d1.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/1/0434/5095/7974/files/zawomikefuseku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/meniwafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/fuvizibegodofamukopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/39895950624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/57150074053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/37938452303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/54702512736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3681/0152/files/tukepuxatugatezepozixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/axial_flow_turbines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/muvavora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6805/3909/files/dopedabiditujadon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3917/9161/files/69435810298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/e8fnk_info_ffmpeg_vp9.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 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_off000071de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 5208 bytes
SHA-256: 13785e564bf9220f886b890812240c2c8319e53199b110e47ae05ec43ce2215a
font_01_sfnt_off0000837b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 9940 bytes
SHA-256: e6f7cca24ef8735b45058eb9d61a84f8362af00aabbf53e817c9197d63494d2c

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