PDF malware analysis — malicious · adbd928537930791

MALICIOUS

PDF

37.4 KB Created: 2020-08-02 21:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8ac422f6e4cd9d1835f67d92bf5bf12 SHA-1: cde3d48c21e47a602ab01a84d482852ee08356ef SHA-256: adbd9285379307913e2fe934a63b32c4c26c8a8781b31e8edc8cdd1c4088d9be

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=air+o+swiss+humidifier+manual'. This URL is designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to distribute the malicious PDF. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=air+o+swiss+humidifier+manual
- http://files.letrim.com/uploads/1/3/1/3/131378852/1041228.pdf
- http://files.numinousmusic.com/uploads/1/3/0/7/130775021/saxefalovud.pdf
- http://files.msjohnstononline.com/uploads/1/3/1/4/131437464/zumemaju.pdf
- https://cdn.shopify.com/s/files/1/0432/5244/9444/files/jofaxazinapubop.pdf
- https://cdn.shopify.com/s/files/1/0432/3436/1503/files/18623947624.pdf
- https://cdn.shopify.com/s/files/1/0429/9476/1877/files/zeguloposevur.pdf
- https://cdn.shopify.com/s/files/1/0431/2468/7014/files/usa_holidays_calendar_2016.pdf
- https://cdn.shopify.com/s/files/1/0434/5449/6935/files/dezibal.pdf
- https://cdn.shopify.com/s/files/1/0431/1223/5159/files/wakanunob.pdf
- https://cdn.shopify.com/s/files/1/0428/3059/4204/files/90666581858.pdf
- https://cdn.shopify.com/s/files/1/0431/0774/5958/files/k_episode_1_english_dub.pdf
- https://cdn.shopify.com/s/files/1/0431/2766/8890/files/75842221742.pdf
- https://cdn.shopify.com/s/files/1/0437/9102/4280/files/54013005928.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
- https://cdn.shopify.com/s/files/1/0433/9050/1020/files/nixoza.pdf
- https://cdn.shopify.com/s/files/1/0430/7111/1330/files/pojogunegazozexu.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_off000048a8.bin` `9d6552aaf9f322158ceb9b5099c84d6810604c97f493b9b0e8f33e34c8591f51`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48A8	5028 bytes
`font_01_sfnt_off00005995.bin` `ab743692401baed0fa44a24ae96667e65ee6551954058c9a69efde93fb546a0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5995	9608 bytes
`font_02_sfnt_off00007a59.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A59	4324 bytes

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