Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecafc233943d54f6…

MALICIOUS

PDF

97.8 KB Created: 2020-08-15 06:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8428990a7561b1ec4f6417fba2c3a38a SHA-1: 9465f04e8f1ce2ea55aa92da76b3a6ef5f02303f SHA-256: ecafc233943d54f6348bc182ccd760d3adddca484a425d2c40c32227488ef15f
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into believing they have won a prize or are due a payment, requiring them to pay a fee for delivery. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a lure related to 'recycle bin apps for android mobile'.

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=recycle+bin+apps+for+android+mobile In PDF document text
    • http://files.uicbcq.org/uploads/1/3/1/4/131454114/6177993.pdfIn PDF document text
    • http://files.nuskin-success.com/uploads/1/3/1/0/131070611/zezopufabonoriw_lixesonibidig_kagirasenufak_verifavinuju.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/1/0436/5792/0677/files/doctor_who_9th_doctor_theme_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/call_of_cthulhu_7th_edition_character_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8157/8136/files/54975710181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/detexolutonoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/64953487003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/datev_anlagenbuchhaltung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9299/1399/files/dovodotatufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/wufevibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/37476215559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/35584278074.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 5

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_off0001446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446F 5548 bytes
SHA-256: 5001b7714b00c79423ed717a1da4f51439dc506627bade3e707ec3a82a9f14b2
font_01_sfnt_off00015736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15736 10308 bytes
SHA-256: 4535c16f6af6061345e32e2b8b6e6302279b9b2090329deaa32f59accebc7ef1

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