Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d7f1a5e9eb691…

MALICIOUS

PDF

36.0 KB Created: 2020-08-22 11:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 572e60224effe1674d964d17254e5dec SHA-1: ab47a718943e7b038f00240853c6b2910cf8c57d SHA-256: 7c1d7f1a5e9eb6910180fda83b6b8fcaa02dbc67a24653f9eb2b0f18d87dc955
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=formica+sheets+wood+grain, which is part of a link farm designed to appear as legitimate content. The ML classifier also strongly indicated maliciousness.

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=formica+sheets+wood+grain In PDF document text
    • http://files.littlehandsomez.com/uploads/1/3/0/7/130739742/8917959.pdfIn PDF document text
    • http://files.milimawear.com/uploads/1/3/0/8/130813846/bd0854.pdfIn PDF document text
    • http://files.lakeskadareagle.com/uploads/1/3/1/4/131438891/8f35b3d0.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/1/0433/0687/7080/files/32600433864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/catalyst_2960_switch_software_configuration_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/95345727463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/wekakubazorimaditupenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/chop_suey_drumless.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/gananebaluvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/nirobita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/citra_para_android_2019.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 6

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_off00004e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E60 5368 bytes
SHA-256: 75f4a946c85c44ad273eebe2f75a371828c8512d94f530810dfba9ac73eb90c2
font_01_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 10240 bytes
SHA-256: 1f02470edac0b0a5304855e7fc15a5403beb4c9a6be21b84259cd9590894914f

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