PDF malware analysis — malicious · 93917b9ccd8920bb

MALICIOUS

PDF

39.6 KB Created: 2020-08-09 05:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 288b9a301fc7beaca44c7576cd69f81a SHA-1: 779cdd40d10d2068d128ecbdf52ddb36e201bf16 SHA-256: 93917b9ccd8920bb0ed64cac9dc3eb9c2a7f26553c5ee36a43768cbd6288b053

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=pathfinder+bestiary+2+pdf, which is likely used to redirect the user to a malicious site. The ML classifier strongly flagged this PDF as malicious.

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=pathfinder+bestiary+2+pdf
- http://files.tuckerhighschoolfoundation.com/uploads/1/3/2/6/132680808/9076443.pdf
- http://ridigul.vietnameravets.com/uploads/1/3/2/6/132681556/f8bfbcf636.pdf
- http://files.maryheskel.com/uploads/1/3/1/3/131379194/namijega.pdf
- http://files.vibrows.ca/uploads/1/3/0/7/130774973/1475345.pdf
- https://cdn.shopify.com/s/files/1/0429/3391/1705/files/robupidoz.pdf
- https://cdn.shopify.com/s/files/1/0436/3704/7449/files/the_biography_of_bill_gates_book.pdf
- https://cdn.shopify.com/s/files/1/0431/0492/7905/files/41161635787.pdf
- https://cdn.shopify.com/s/files/1/0439/0112/4760/files/56333506712.pdf
- https://cdn.shopify.com/s/files/1/0431/9880/8224/files/60510407932.pdf
- https://cdn.shopify.com/s/files/1/0437/6995/4456/files/lujob.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
- https://cdn.shopify.com/s/files/1/0430/1278/4277/files/vazugazuxa.pdf
- https://cdn.shopify.com/s/files/1/0432/4101/3415/files/muwufazuxo.pdf
- https://cdn.shopify.com/s/files/1/0431/4071/0566/files/42843157122.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005c52.bin` `8f5d788d1071a0f9a09b0a1e652afd194bb9075cfeffa29f3ba6f0c609a44829`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C52	5472 bytes
`font_01_sfnt_off00006eec.bin` `d6a2fdd7c71248a70a7e926d947c11262bd3263fa75a8df5f5949b9a578818d7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EEC	10272 bytes

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