PDF malware analysis — malicious · b397e8f35fdf3cd5

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 22:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c3ae303c22d7884d07075dedce3fb2d8 SHA-1: 1e339a62c1a170fd2486665dc8a16e170b8f12cd SHA-256: b397e8f35fdf3cd5eabcf52cdaf5d01146b794011e3058f810d083e0df65809d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text related to exam results and the malicious URL. The primary malicious URL is https://ttraff.cc/pify?keyword=bin+sachivalay+clerk+exam+result+2020+pdf, which is likely used to redirect the user to a malicious payload. No scripts were extracted from this sample.

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=bin+sachivalay+clerk+exam+result+2020+pdf
- http://files.monmatgrp.com/uploads/1/3/2/7/132712199/2924916.pdf
- http://files.confettiandjoyphotography.com/uploads/1/3/1/3/131384208/60cdfd097eb.pdf
- http://files.sigridehemann.com/uploads/1/3/1/4/131452935/gajuwezufene.pdf
- https://cdn.shopify.com/s/files/1/0436/4114/3454/files/55773105967.pdf
- https://cdn.shopify.com/s/files/1/0431/3546/7669/files/tematazuwo.pdf
- https://cdn.shopify.com/s/files/1/0429/6740/0601/files/dupakivote.pdf
- https://cdn.shopify.com/s/files/1/0433/8342/3128/files/83990383214.pdf
- https://cdn.shopify.com/s/files/1/0431/7121/7565/files/sumorukafugivovelerexi.pdf
- https://cdn.shopify.com/s/files/1/0430/5430/1338/files/konurumofixijaxowifutek.pdf
- https://cdn.shopify.com/s/files/1/0435/5666/7541/files/native_american_word_search.pdf
- https://cdn.shopify.com/s/files/1/0437/9285/9293/files/lemarepidepopejuzaxitota.pdf
- https://cdn.shopify.com/s/files/1/0438/1619/0112/files/vimigutufarutugopoti.pdf
- https://cdn.shopify.com/s/files/1/0438/8870/5688/files/25594787077.pdf
- https://cdn.shopify.com/s/files/1/0433/5671/7207/files/66009380511.pdf
- https://cdn.shopify.com/s/files/1/0438/1189/7504/files/lebamamigeto.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_off000061bd.bin` `a67ae9b95d601e398936064cea73ae9f53eda16ef1a58a81efe1966001ecf295`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61BD	6012 bytes
`font_01_sfnt_off0000761e.bin` `a58264669b10aca467c32d17d4849d10190e0993709094024caeb72e2a79c830`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x761E	10272 bytes
`font_02_sfnt_off00009978.bin` `00e71a05869d3b11269be3b12378b9e6901e278056f374220c237a503e5b19d4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9978	2904 bytes

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