PDF malware analysis — malicious · 3a852493d78e0e79

MALICIOUS

PDF

97.8 KB Created: 2020-08-09 03:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a81057af93ea4345bbfc4d966ba12d33 SHA-1: 50b7d1ff0dcfcc941ebcc681096b1f2c80cc9df9 SHA-256: 3a852493d78e0e79b2e98c938fdc69c94bb44c684bb917b331daa5ea1ec2c538

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains the URL that is also present in the heuristics. This suggests the primary goal is to redirect the user to malicious infrastructure. No scripts were extracted, limiting the ability to determine further payload delivery or persistence mechanisms.

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.cc/pify?keyword=pdf+of+multivariate+normal+distribution
- http://files.rone.studio/uploads/1/3/1/3/131379266/gopijiwupevutekifari.pdf
- http://fifage.lmctotherescue.com/uploads/1/3/1/1/131163599/givozupimexejasatu.pdf
- http://fonesapi.whogivesascrapcolorado.com/uploads/1/3/1/3/131383664/7894999.pdf
- http://files.drtaoka.com/uploads/1/3/1/1/131164393/7087916.pdf
- https://cdn.shopify.com/s/files/1/0434/2756/1634/files/the_antlered_ship.pdf
- https://cdn.shopify.com/s/files/1/0431/5840/5274/files/air_conditioner_cycle_diagram.pdf
- https://cdn.shopify.com/s/files/1/0430/8910/0951/files/18852544513.pdf
- https://cdn.shopify.com/s/files/1/0440/2118/6718/files/calentadores_solares_caseros.pdf
- https://cdn.shopify.com/s/files/1/0430/5308/8919/files/list_of_b_pharmacy_colleges_in_maharashtra.pdf
- https://cdn.shopify.com/s/files/1/0440/4484/5206/files/rename_dataframe_column_r.pdf
- https://cdn.shopify.com/s/files/1/0435/3641/6936/files/bapajemumirire.pdf
- https://cdn.shopify.com/s/files/1/0433/4921/3349/files/byte_to_string.pdf
- https://cdn.shopify.com/s/files/1/0435/2881/4760/files/pokifodarigazanexe.pdf
- https://cdn.shopify.com/s/files/1/0428/2561/3475/files/advantages_and_disadvantages_of_direct_marketing.pdf
- https://cdn.shopify.com/s/files/1/0428/9301/7247/files/32069534527.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_off000116fd.bin` `9d10aef151b2d245a1775c8b4dc05aa3ebcd79088db8f2b7094dcdc1ebe3703a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116FD	5252 bytes
`font_01_sfnt_off000128c7.bin` `7fe846e3b54cea8af55457e01755a2a6d71bc509693a96236d25879f08fc10aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128C7	17996 bytes
`font_02_sfnt_off000161d8.bin` `9ff8a9de27d3f29295606172d5af35b85ccaa9c0a9212ad4ccb10132021197d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x161D8	16744 bytes

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