PDF malware analysis — malicious · d65c85b645724b12

MALICIOUS

PDF

61.4 KB Created: 2020-08-02 05:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c245f7d2aab4c377db6b80a7077871ab SHA-1: 7950dab7a168f328adc5da0d43bf44fe2a9f8b8d SHA-256: d65c85b645724b1219467d8a68414529bddb848c99a26658da616691c57914b9

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=remove+punctuation+python+3'. Another heuristic indicates a large link farm, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, reinforcing its role in the attack.

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=remove+punctuation+python+3
- http://files.nature-recharge-botanicals.com/uploads/1/3/2/6/132683087/1950813.pdf
- http://files.nwtmta.org/uploads/1/3/1/1/131164446/bubupidipexikepo.pdf
- http://files.midamericaairmuseum.org/uploads/1/3/1/6/131607805/63c050915.pdf
- http://files.elisemitchellcoaching.com/uploads/1/3/1/4/131437689/ziwizijejixaz.pdf
- http://files.dallasmoderne.com/uploads/1/3/1/6/131606360/reputiranisemapo.pdf
- https://cdn.shopify.com/s/files/1/0434/2821/6983/files/php_video_stream.pdf
- https://cdn.shopify.com/s/files/1/0437/2476/7400/files/jufonorupozakevam.pdf
- https://cdn.shopify.com/s/files/1/0431/0145/4500/files/kufabolakedugexugulazar.pdf
- https://cdn.shopify.com/s/files/1/0432/9324/5590/files/jobide.pdf
- https://cdn.shopify.com/s/files/1/0434/7301/0840/files/kiwidapemurapiwolonivug.pdf
- https://cdn.shopify.com/s/files/1/0428/2250/0518/files/67231537064.pdf
- https://cdn.shopify.com/s/files/1/0441/3220/4696/files/90316018790.pdf
- https://cdn.shopify.com/s/files/1/0429/2752/1948/files/92161815458.pdf
- https://cdn.shopify.com/s/files/1/0438/3545/7698/files/vasiwijejuvenin.pdf
- https://cdn.shopify.com/s/files/1/0431/2465/4241/files/ford_535_backhoe_manual.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_off000084bb.bin` `e84618c6015f888ca346cb6f5f6e1111e2d7d6fbf4c70a6d6edb1b01bebbe72c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84BB	9244 bytes
`font_01_sfnt_off0000a36e.bin` `5b459c9bd61883d36b2a8fb3615d9e61672a67ef361eebf224572b6dcc1ad05d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA36E	5200 bytes
`font_02_sfnt_off0000b518.bin` `e3a53893df1aa2eae98fb17c3e7c6ba65779768ef178a2864227e1d610b367f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB518	16428 bytes

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