Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c94ef4c356808f2…

MALICIOUS

PDF

47.5 KB Created: 2020-10-30 15:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 990a52d9fe3d5b9e5452a030d1c1ff28 SHA-1: 7c93c891322d853f32b7009e72221dfb6626f534 SHA-256: 4c94ef4c356808f260e6552ae7e4fb5406db2983fa4b9573d7d40bf477d3ccd8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of a link farm suggests an attempt to manipulate search results or distribute malicious content, aligning with spearphishing or drive-by download tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/123?keyword=words+beginning+with+w In PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/taxigefug-tafutunirebuza-morarotod-foremizosis.pdfIn PDF document text
    • https://fajagewuw.weebly.com/uploads/1/3/4/3/134350503/21f4e7.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/251863c8c9d9.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/nevazaxomuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f92843317f7a.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/1/0431/3192/8730/files/99731700768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3159/3628/files/48632549292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5010/6532/files/income_tax_act_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4540/4327/files/water_for_people_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1927/4920/files/xabigitap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2463/6823/files/95158519184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8132/7296/files/rejokoxunijelegopexuzil.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_off00006e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 4876 bytes
SHA-256: 9662788d030802746784dd15246eca62176c34fcf035e7a28d6e287c8e356c80
font_01_sfnt_off00007f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0E 11012 bytes
SHA-256: bf197f2ce943fe12091b72d5ba7d4a600ef2491e33736eb1ed1b9fef5859e80f
font_02_sfnt_off0000a305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA305 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.