Malicious PDF — malware analysis report

Static analysis result for SHA-256 844cd57a6f747425…

MALICIOUS

PDF

35.0 KB Created: 2020-08-06 08:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a60320108dac3aae14393a4a8d9f6492 SHA-1: 27f60275c3fe88c42d28f3899b3d84d0b7bac22b SHA-256: 844cd57a6f7474250f9b5b091154a360c387a9dc392b706d5750cd015272622d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector to a known malicious URL. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into clicking it. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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=biblia+de+referencia+thompson+rvr1960+pdf In PDF document text
    • http://files.naturallyphoto.com/uploads/1/3/1/3/131382243/muril.pdfIn PDF document text
    • http://wopigezok.biblebelieversoflouisville.net/uploads/1/3/2/7/132712093/7437381.pdfIn PDF document text
    • http://files.lizromanek.com/uploads/1/3/0/8/130813782/1808551.pdfIn PDF document text
    • http://moguguze.capitalpollinatornetwork.com/uploads/1/3/2/7/132740892/5784839.pdfIn PDF document text
    • http://files.tbcsr.org/uploads/1/3/2/7/132740743/nejexerabumuso-zalij-viwuvowagikit-lojon.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/1/0434/9889/7574/files/67398030295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/media_query_mobile_only.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/good_life_kanye_west.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/94604011725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/94837248010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/zekawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/aitsl_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/42067915720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/55024145471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/5982697245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/kukapememuzeriba.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 2

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_off00004698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4698 6148 bytes
SHA-256: ae3d241189ce483e2eb7fe627eca9ce9f9e5137d04d99a3e4d59568539232585
font_01_sfnt_off00005b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 10096 bytes
SHA-256: 6a48c19eeceb30a10c0ba303505d85f5a44b794e5f0f13c956b48c5a4a31e1a8

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