Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7c782cf230df44…

MALICIOUS

PDF

45.0 KB Created: 2020-08-20 02:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e685b2082bdbe4a7ef443a257f8f835 SHA-1: 640c3b1858972d70cf35f803bb94844ef3b816e4 SHA-256: 8e7c782cf230df4411d9328d778c9c7cfe830ed6442c90967f1dc04388fe5434
194 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text fragments that appear to be a lure for applying for leave, combined with the malicious redirector URL. This suggests the document is designed to trick users into clicking the malicious link, likely leading to further compromise.

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=apply+leave+formal+letter In PDF document text
    • http://reveno.rapidintegration.com/uploads/1/3/0/9/130969332/wugoxab-pedefepa-danovinekik-bololur.pdfIn PDF document text
    • http://xopezawe.scalelive.com/uploads/1/3/0/7/130775740/bojuzebakem-jufudu.pdfIn PDF document text
    • http://files.ewb-midmaryland.org/uploads/1/3/1/4/131483209/pitedozimugatag.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/1/0432/7325/7116/files/wiwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/givulim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/bilbao_metro_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/plantas_alimentcias_no_convencionais_no_brasil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/alopecia_androgenica_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6791/6696/files/huawei_software_update_tool_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/general_principles_of_accounting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/meliwutojujolilaxiwebuwob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1300/3674/files/vazufazonukix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/99688938679.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 1

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_off00007337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7337 5020 bytes
SHA-256: 92bc39dd9d1c9e9a4bd7a01d702ed1b70abe791a2bbe23487b67a512910af1b6
font_01_sfnt_off00008447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 10316 bytes
SHA-256: 7e23aebd4041916cb715c3334f88df139ccffd09755d726c280ca9e8edbe566b

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