PDF malware analysis — malicious · 8242623c9dd44ce2

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 21:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 624afa1b9fb9732f547bd32093841e7b SHA-1: 2317ab51ee2201cefd5c817f48b6fb4817369165 SHA-256: 8242623c9dd44ce2e28d8cc029233c04cb1f8699f7d43d6665850c823392ec04

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on static.usrfiles.com, forming a link farm. One of these links, 'https://ttraff.club/wix?keyword=serie+homologa+de+los+alquinos', is flagged as a known malicious redirector. This suggests the document is designed to direct users to malicious infrastructure, likely for phishing or to download further malware.

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.club/wix?keyword=serie+homologa+de+los+alquinos
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_4a646338c86f4a83885676201460208a.pdf
- https://static.usrfiles.com/ugd/b8c837_889bbe83afd54d46bbfef5d9a3a0254c.pdf
- https://static.usrfiles.com/ugd/0d9a50_951b5f2682204bb3afd6cb86c43d7d46.pdf
- https://static.usrfiles.com/ugd/b8c837_66d471974631470d906d39d0ad24135d.pdf
- https://static.usrfiles.com/ugd/b8c837_1dce4846a3a849f1ab492667eb27d0f4.pdf
- https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
- https://static.usrfiles.com/ugd/0d2908_f899f234a0e74a93a135ac3a720c8a72.pdf
- https://static.usrfiles.com/ugd/2c608b_238f380e6ee9420b943976624aed020c.pdf
- https://static.usrfiles.com/ugd/eb4c03_b773aefaf1ea4bc4a20050500349d624.pdf
- https://cdn.shopify.com/s/files/1/0432/3619/6507/files/tinuxugususuxidaserigeka.pdf
- https://cdn.shopify.com/s/files/1/0430/7792/7072/files/warlords_of_draenor_private_servers.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006290.bin` `ec7ec77cbabc5fb5b430a4260d4d19f6b888b0b077b59a236e7370e4aa4a95fc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6290	5468 bytes
`font_01_sfnt_off000074ee.bin` `6954b2a302bda17741bebb8439d2237530ab2a1fa80510e28daebdb51a8c1272`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74EE	12076 bytes

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