Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef796a2d2a4ff14…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 18:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fcb7aa1f85416ef016d3c3a8b187e443 SHA-1: e4c9e92b2a584384a73a9cd796a0a747ada496a0 SHA-256: 5ef796a2d2a4ff1406a4ab7ca0cd77c47b5d90a704f54ff3973c42356f6f4d3c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and heuristics suggest a lure related to online PDF conversion, directing users to the malicious URL. While no scripts were extracted, the PDF's structure and embedded links strongly indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=online+pdf+converter+to+word+online+free In PDF document text
    • http://files.rouxtaipei.com/uploads/1/3/1/3/131379506/jozuzep.pdfIn PDF document text
    • http://files.mkhmfg.com/uploads/1/3/0/8/130874352/bajab.pdfIn PDF document text
    • http://files.uk.lollandfalsterairport.dk/uploads/1/3/1/4/131406658/7326236.pdfIn PDF document text
    • http://files.menopausalmommyrants.com/uploads/1/3/0/9/130969837/nilesogesakila_wewedo_vanuv_xepomatem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6282/3834/files/creativity_invention_and_innovation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/19266991965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/fisopipasizitulekamavurod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/72705324243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9673/3864/files/30013191554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/android_studio_3._3_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/92344894192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/rurimenedinosoresat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/tutorial_de_excel_intermedio_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/95384706705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/20532153239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4B 4728 bytes
SHA-256: 07723ab2129caf87f19ceaee861bdb4fcba8d3f6aeafaae35d838c2c3dc73585
font_01_sfnt_off00006a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7D 10348 bytes
SHA-256: b9468f563af26baf8b7fd6b80f446f3fc40ec8861a029630493b6784695bc688
font_02_sfnt_off00008de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e