PDF malware analysis — malicious · 4f1cad420b8722e0

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 02:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1f2dec5bc4076147ce42bb22194efa51 SHA-1: 9ab075bb673a7fa34d38d09521e99ede0bbd3868 SHA-256: 4f1cad420b8722e0cd9ced980b628ed7ae854d943c8771ca9cb39c179629cc00

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body text, though garbled, contains 'Sap banking suite' and a URL, reinforcing the lure. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous external links, consistent with SEO poisoning or link farm tactics to obscure the final malicious destination.

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/wix?keyword=sap+banking+suite
- https://static.usrfiles.com/ugd/b8c837_321509018dc64367ae7f55a15431404a.pdf
- https://static.usrfiles.com/ugd/b8c837_abc924ab436a478fa42cac534a7d5361.pdf
- https://static.usrfiles.com/ugd/585b1d_03d7f1abd52d4e7497acc5309cdfa9dc.pdf
- https://static.usrfiles.com/ugd/51c472_25ae02d5f139494a939b0952ca6d380a.pdf
- https://static.usrfiles.com/ugd/c4ccc4_8b22fef351c74a08bea314e93e1c7f50.pdf
- https://static.usrfiles.com/ugd/9ea91e_2920ce65090d435b91395ede0d7d74fa.pdf
- https://static.usrfiles.com/ugd/b8c837_7542c7f67ad24ae6b4c755e5b9fd0709.pdf
- https://static.usrfiles.com/ugd/eb4c03_9ca1f5ae2734499fabac37e86f4e6b3e.pdf
- https://cdn.shopify.com/s/files/1/0441/3066/4600/files/best_gaming_background_music.pdf
- https://cdn.shopify.com/s/files/1/0435/8311/1323/files/gotex.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005c16.bin` `b858c440c6923a1c2a720747bf640e85de406d47631bf67c6305591b8ea062b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C16	4940 bytes
`font_01_sfnt_off00006cea.bin` `bd1fc227aaeb2c5cec91090bb8a1cc61bbcf33aecdcffccb64e0a6dd1294705f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CEA	9952 bytes
`font_02_sfnt_off00008ef0.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EF0	4324 bytes

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