Malicious PDF — malware analysis report

Static analysis result for SHA-256 3845521cb6d1e9a0…

MALICIOUS

PDF

84.0 KB Created: 2020-08-03 11:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9dc9895389d0fcbb65520b10997f7a98 SHA-1: 5e456f757d79ee4fb738cda63018ba087933c390 SHA-256: 3845521cb6d1e9a033df90905c89ebc40d47d9e4210eca7c168c9cb1b3216f44
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. Specifically, it links to a known malicious redirector at 'https://ttraff.cc/pify?keyword=classification+of+chromatography+techniques+pdf'. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure for users searching for chromatography techniques PDFs. The ML classifier strongly supports the malicious verdict.

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=classification+of+chromatography+techniques+pdf In PDF document text
    • http://boxuziba.uhurugirlsacademy.org/uploads/1/3/0/7/130739625/dopinoxamamemel.pdfIn PDF document text
    • http://files.yourhousepimp.com/uploads/1/3/2/6/132695554/6522c037b.pdfIn PDF document text
    • http://files.reedertranslation.com/uploads/1/3/1/6/131637021/riwabaxenelekedudenu.pdfIn PDF document text
    • http://files.gassingamerica.com/uploads/1/3/1/4/131409693/8089457.pdfIn PDF document text
    • http://files.heartoftexasarmory.com/uploads/1/3/0/8/130874284/4195896.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/1/0437/6703/8109/files/xupubavadimul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/34788126945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2772/6489/files/65062895341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/23419171127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/longest_anime_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xomegaxafedag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/favubidabiruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/83065962297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/xixetefevajekowuseke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/wirokokanomude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/letoviwabijagok.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 5704 bytes
SHA-256: b7570145f397ed68bf64015932477bebaaf0fa78f8025e9fb087af5fe65b91ea
font_01_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 12692 bytes
SHA-256: cd24a5b8a5f4b797def5b4902225fac90963963a84870081f0b9f5ca68654c14
font_02_sfnt_off00012cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBC 16184 bytes
SHA-256: 9e4265a29980eb0856412f08a1531ef9bc31f7270d08920f81547b60c48c08f3