Malicious PDF — malware analysis report

Static analysis result for SHA-256 105109b02e0c1315…

MALICIOUS

PDF

48.0 KB Created: 2020-08-05 03:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b86930e95e86bcc3ab7d3a990cc20a6 SHA-1: 3d759cfbb521e691d1413c880ca96b201ed18c4d SHA-256: 105109b02e0c1315e2e2cc170db7e2f84134bcda3b27f32f2f9d728d07bd3108
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to a known malicious redirector, and another for a link farm. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=after+livro+1+pdf+download+gratis', is the primary indicator of malicious intent. This suggests the document is designed to trick users into downloading potentially harmful content by masquerading as a free download link.

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/pify?keyword=after+livro+1+pdf+download+gratis
    • http://bigegumur.suitsswagger.com/uploads/1/3/0/8/130873951/genopijorabadej.pdf
    • http://files.klineglazeservice.com/uploads/1/3/1/6/131606231/visukuzozuka.pdf
    • http://files.kachemak.co.uk/uploads/1/3/1/8/131856050/3299679.pdf
    • http://files.eaglehealthinsurance.com/uploads/1/3/0/9/130969818/8c5ca.pdf
    • http://files.cwlawpartners.com/uploads/1/3/2/7/132741144/68aad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1167/8114/files/85494410858.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/mixetutasodusojemorotabag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/76011660298.pdf
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/64401042839.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/85133177190.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/fewuwerufexin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/fupipiwabebezeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/ht2000_motherboard_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eba.bin
47286f668598df1ddc21214b6c57549fd1aa7d4de4c0503289fc42395db2a5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 5188 bytes
font_01_sfnt_off00008092.bin
7fb03e6872b21dcaa929604f22c7b327e1f057ea4d0b33a534662d32113c0995		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 10548 bytes
font_02_sfnt_off0000a49d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49D 4324 bytes

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