PDF malware analysis — malicious · 5419d90549ae65a9

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 12:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 992e5c20bbc094bad09e02d6d4f6925a SHA-1: 2d47a994b66149aff73fbab5b12c7d3c0a97cd34 SHA-256: 5419d90549ae65a94e146ed5c72f996f80795ff23c82cff691e303002903c6db

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to converting PDFs and references to wkhtmltopdf, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive link.

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=convert+scanned+pdf+to+word+free+software
- http://files.atticplayers.com/uploads/1/3/0/8/130873804/1834913.pdf
- http://files.roxstardance.com/uploads/1/3/1/4/131412426/a78532c782085.pdf
- http://files.en.skydivevoss.no/uploads/1/3/1/0/131069763/e0c924ced34d26d.pdf
- http://files.rehobothchildrenstheatre.org/uploads/1/3/1/4/131437005/8573961c659c3.pdf
- https://cdn.shopify.com/s/files/1/0435/4323/2661/files/youtube_on_repeat.pdf
- https://cdn.shopify.com/s/files/1/0431/5627/5362/files/weduribusosuvigosi.pdf
- https://cdn.shopify.com/s/files/1/0432/3573/7755/files/avl_tree_java.pdf
- https://cdn.shopify.com/s/files/1/0437/7490/2423/files/93159295409.pdf
- https://cdn.shopify.com/s/files/1/0438/3752/2080/files/pabovomixovogasebo.pdf
- https://cdn.shopify.com/s/files/1/0429/7241/4106/files/wegerosa.pdf
- https://cdn.shopify.com/s/files/1/0435/3762/9348/files/4038931890.pdf
- https://cdn.shopify.com/s/files/1/0440/8282/3320/files/tp_link_tl-_wn722n_driver.pdf
- https://cdn.shopify.com/s/files/1/0429/4826/4089/files/wixijitejumumiw.pdf
- https://cdn.shopify.com/s/files/1/0432/2826/6654/files/42337494398.pdf
- https://cdn.shopify.com/s/files/1/0437/8548/6485/files/wufetaduxi.pdf
- https://cdn.shopify.com/s/files/1/0432/8760/9497/files/lirodib.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.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_off00006878.bin` `2394885996a1dbdcfadd9b414f5dffcb76efc902a70093e52a6f80ecd743fc0b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6878	5176 bytes
`font_01_sfnt_off00007a35.bin` `bb89e53d3c07be8ddaca0c9373543bc823545a98edff2c7adf17c1da4ce27661`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A35	9768 bytes

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