Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0f211239f5bb30…

MALICIOUS

PDF

36.2 KB Created: 2020-08-05 09:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2215de92d3918d6066ea40fecac302d SHA-1: 3981758bf8c79295fc4c6024339aee1fd7891e29 SHA-256: 4d0f211239f5bb30a4ff113ea19773f4865e3590763e960ec03681a76afe059b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=normalidad+y+anormalidad+epidemiologia+pdf', is known to redirect to malicious infrastructure. This suggests the document is part of a link farm or SEO manipulation scheme designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=normalidad+y+anormalidad+epidemiologia+pdf
    • http://files.thefaithlife.org/uploads/1/3/0/7/130739225/432229.pdf
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdf
    • http://files.toolbeltoflearning.com/uploads/1/3/0/7/130738675/72c1cd805.pdf
    • http://files.the-prowler.com/uploads/1/3/1/0/131070940/6622053.pdf
    • http://files.ashlandmarina.com/uploads/1/3/1/8/131871704/toxefajenofejat_pinov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/todimamifagefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/dezuxazaxujuzuzanup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/zelabufurigopigazuvilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/44010959617.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/divudoxakijorived.pdf
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/edgar_allan_poe_a_critical_biography_arthur_hobson_quinn.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jazaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/zasoziwubipipisax.pdf
    • https://cdn.shopify.com/s/files/1/0434/4542/0188/files/xasezipedigase.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c2.bin
9e8c5cd09ce6a8762f9b656777aeefd74047fabd7a8942fc52287ac347b1725f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C2 4964 bytes
font_01_sfnt_off0000578b.bin
9c3d5362851da0a17d18e67d66768d0dbd67b525196969f19a92379d38092d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x578B 8760 bytes
font_02_sfnt_off000073ef.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 4324 bytes

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