Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa105b194f0175f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-02 16:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1abaf0c1de63d7456161e97ba2831978 SHA-1: e9e29da59b8c85002e0451d45a70949211771c50 SHA-256: 4aa105b194f0175fe51e86385608598e376ca9ad01ba105ebc21f4a072e13f85
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'cash flow' and includes the malicious URL. The presence of numerous external PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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=direct+vs+indirect+cash+flow In PDF document text
    • http://files.nepalrvt.org/uploads/1/3/1/6/131606289/9a163d3.pdfIn PDF document text
    • http://files.zumbawithmlinda.com/uploads/1/3/1/4/131406337/7881585.pdfIn PDF document text
    • http://files.twogreenshoots.com/uploads/1/3/2/6/132681479/luniz.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/1/0429/2981/5705/files/suriziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/nobuzufisibilejadovasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8288/2980/files/43630869068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/19229988962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/14930570202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/tizufugolevidipugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/36991332729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/19979275368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/67013326425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/medajodebaxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/marasudok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4613/2119/files/filumis.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 5048 bytes
SHA-256: 86a06bbcdba2df55a67d287dde769aa9c83e997d0dc67635c8994d3b8b3fd0f0
font_01_sfnt_off000076f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 10236 bytes
SHA-256: 0c479722eb85545f4b8cac963691c739183bf6899cea92ada992cc37a81a53fb
font_02_sfnt_off000099ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99EF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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