PDF malware analysis — malicious · 7a1c317699f394b8

MALICIOUS

PDF

56.2 KB Created: 2020-09-17 12:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2ce28336f561d570556830507089ed14 SHA-1: 6c8d68f70a0f020f20380c3c154cfd5bedc6513e SHA-256: 7a1c317699f394b84cf96269b80fd17a7a87018352cd759e39cde372fa9267cb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure and also for containing a mass external PDF link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the primary malicious URL, suggesting an attempt to lure users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.link/wix?keyword=grep+manual+regex
- http://kimapaxup.bbt-livonia.com/uploads/1/3/2/3/132303354/18d0dca34.pdf
- http://gumofovu.michaelcullipher.com/uploads/1/3/1/3/131379012/vujil.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/0720/3739/files/72374528424.pdf
- https://cdn.shopify.com/s/files/1/0441/2276/7512/files/causes_of_induced_abortion.pdf
- https://cdn.shopify.com/s/files/1/0428/4488/1059/files/92551739871.pdf
- https://cdn.shopify.com/s/files/1/0431/6594/1917/files/problemas_psicologicos_en_nios.pdf
- https://cdn.shopify.com/s/files/1/0428/9236/1887/files/zikemigixinow.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53741046047.pdf
- https://cdn.shopify.com/s/files/1/0435/3146/8951/files/aneurisma_cerebral_2020.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000890a.bin` `57af233cc272fc280b6aa2a2d2ccaa72bb874d5d53bf4d7a50d64ff3a7559fea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x890A	5060 bytes
`font_01_sfnt_off00009a32.bin` `36144ae0cc07db2dfe45a8d6e526d32070eb2ef9517f3783484fcdff254fee15`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A32	10844 bytes
`font_02_sfnt_off0000beed.bin` `d1c727812a8f964882f1301a824b6764c0f15d18538cb9e0ca36d9eb6e966c11`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEED	16244 bytes

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