PDF malware analysis — malicious · 4d72703065ce1e17

MALICIOUS

PDF

51.3 KB Created: 2020-08-17 08:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b08416da5006b1b7f5e2b033a25cb954 SHA-1: 7f9b74285c0064a1c5575ce8f60c4fdc45521044 SHA-256: 4d72703065ce1e17ec4b68500cd9658ba6bf945236c892a44e25c6c196a2bc91

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with the primary malicious link pointing to a redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=jquery+locale+number+format' and other PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=jquery+locale+number+format
- http://files.susanmaakestad.com/uploads/1/3/2/3/132303382/4fac45ad3a.pdf
- http://files.4littleoneshilo.net/uploads/1/3/2/7/132710661/kefar_xubizesalubav_jupupofixexedul_pepebezoran.pdf
- https://cdn.shopify.com/s/files/1/0434/0449/2950/files/33364597862.pdf
- https://cdn.shopify.com/s/files/1/0431/6643/3429/files/nezonutuludizekoxolaxoxur.pdf
- https://cdn.shopify.com/s/files/1/0438/4194/5760/files/2328043800.pdf
- https://cdn.shopify.com/s/files/1/0434/5652/8537/files/gipidabotobanaxafumidufa.pdf
- https://cdn.shopify.com/s/files/1/0429/6779/3820/files/khmer_calendar_1988.pdf
- https://cdn.shopify.com/s/files/1/0434/1858/3192/files/98743270328.pdf
- https://cdn.shopify.com/s/files/1/0432/4648/5672/files/15811949684.pdf
- https://cdn.shopify.com/s/files/1/0429/4852/6246/files/sedigigoguxeko.pdf
- https://cdn.shopify.com/s/files/1/0438/0252/5856/files/theory_of_computer_science_automata_languages_and_computation_download.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
- https://cdn.shopify.com/s/files/1/0435/9792/2461/files/antimicrobial_activity_thesis.pdf
- https://cdn.shopify.com/s/files/1/0437/8748/5342/files/82204798197.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006530.bin` `970df20cf71482ca9ba5d21745dc8efc6fab06b090ba83e15261651377588f30`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6530	3332 bytes
`font_01_sfnt_off00007132.bin` `cb4b0531619a59158b2106f6d5aacf368fa8645b64da41de634a58f9d8818f6c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7132	5204 bytes
`font_02_sfnt_off000082e9.bin` `c796e4c819ae9e6a7da191fcc7de29da872c07ceae15a686545463d107d1bb52`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82E9	10656 bytes
`font_03_sfnt_off0000a74b.bin` `870e13d47c88a20759003fa8da1e037d41ac2ef16097b2357e995a07d486cb5b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA74B	17004 bytes

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