Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c3193e09464007…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 19:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f535464517d546775fb1fe57c2695b5d SHA-1: 853c10ba394f1e961f228c538d3952b7b2affee6 SHA-256: e1c3193e09464007466541e34cf17dc9e3412657c20f3ee356b5dde157675cdc
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to SEO poison, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a worksheet and the malicious URL. The primary attack vector appears to be luring the user to click the malicious link under the guise of accessing educational content.

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=latitude+and+longitude+worksheet+answers+key In PDF document text
    • http://files.milkywayfarm.net/uploads/1/3/0/9/130969825/9205158.pdfIn PDF document text
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdfIn PDF document text
    • http://files.legacyofcolumbo.com/uploads/1/3/2/6/132680813/036b82564711c5.pdfIn PDF document text
    • http://dimovun.kimjfitzgerald.com/uploads/1/3/1/4/131454065/24ae6.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/1/0435/3287/7975/files/cdo_full_form_in_district.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/spoken_english_basic_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/suwakewinewikez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/tudifebatozabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/zerizetegavajewowoxikusum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/bosch_series_4_washing_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/wiwulovididodemidin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/lettre_alphabet_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/ford_5_speed_manual_transmission_identification.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_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5288 bytes
SHA-256: 98290165ec445e93012a2384b0b95508b7daf7cf988c108942faa7880267affb
font_01_sfnt_off00007387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10304 bytes
SHA-256: 79be97898084f55e34868e08cb50663fbf2d8c16099743039a86b4d650ed0281

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