Malicious PDF — malware analysis report

Static analysis result for SHA-256 c370c51eac23cc2d…

MALICIOUS

PDF

61.3 KB Created: 2020-08-05 09:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 110acf3fa95ccaf5dea371c1e278711d SHA-1: b74d30f3098a610399182794c17f234de99b0427 SHA-256: c370c51eac23cc2d96e0dfb99565454472ee5470b838c565dcbb818c9b9fbce6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=apprendre+l+espagnol+cours+pdf', suggesting a phishing or social engineering attempt to trick users into visiting a malicious site. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent.

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=apprendre+l+espagnol+cours+pdf In PDF document text
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdfIn PDF document text
    • http://files.colordoor.org/uploads/1/3/0/9/130969603/jobigomuridoriv.pdfIn PDF document text
    • http://wadolix.rockwehrmann.com/uploads/1/3/0/7/130776483/8a4ab9972ef1.pdfIn PDF document text
    • https://www.espagnolfacile.comIn 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/1/0427/7328/2983/files/96989909812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/33983796125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/17457666738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/fejususix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/just_like_animal_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/sebexorimivin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/kanugesopijederori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/31091088572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/int_max_value_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9223/8745/files/skull_trooper_purple.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_off0000b08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08A 5312 bytes
SHA-256: 1e8541f4dee6825907148fbcb6cc291f02a6b5b5776e4c69fbc79ff48fe28991
font_01_sfnt_off0000c2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AB 11560 bytes
SHA-256: 3170c961cf2df2baa15a8adf8c82bcb1607418bea3a0f9caac1dfb3f0d3f9d61

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