PDF malware analysis — malicious · 3cb2cbf66c033528

MALICIOUS

PDF

49.0 KB Created: 2020-09-07 05:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 018e738ce4df7b6de7907e37a5951f5d SHA-1: 1172670445b48527b4119c9e792457b0d2128512 SHA-256: 3cb2cbf66c033528b7908f690275bbbd0f6739a505c6b5451e0b083ea86faca7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=factors+affecting+enzyme+action+worksheet'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The document body, though partially corrupted, contains text related to 'Factors affecting enzyme action worksheet', likely a lure to disguise the malicious intent. The ML classifier 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/wix?keyword=factors+affecting+enzyme+action+worksheet
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
- https://cdn.shopify.com/s/files/1/0428/5107/4204/files/sijudirixekixomufesi.pdf
- https://cdn.shopify.com/s/files/1/0431/6538/4866/files/runexebefabek.pdf
- https://static.usrfiles.com/ugd/98e298_bb1d7244657e4352aff641054bbac4f9.pdf
- https://static.usrfiles.com/ugd/cbdbb6_d5469cce888b4468aa0a5bd279b10c16.pdf
- https://static.usrfiles.com/ugd/cd79e3_6841508110634faf8bb9dcf01f6477d3.pdf
- https://static.usrfiles.com/ugd/b77b08_91bae6ed42b94cf2b7b448fa53ef21dd.pdf
- https://cdn.shopify.com/s/files/1/0441/0654/7352/files/mozefi.pdf
- https://cdn.shopify.com/s/files/1/0439/3297/5272/files/brunner_and_suddarth_13th_edition_ebook.pdf
- https://cdn.shopify.com/s/files/1/0434/4234/0007/files/sims_3_torrenty.pdf
- https://cdn.shopify.com/s/files/1/0431/6043/6900/files/tusiwi.pdf
- https://cdn.shopify.com/s/files/1/0432/6536/0034/files/57136268153.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_off00005fb7.bin` `5014b1ad12749a9dc4b1e60d5cab4ce903eaed7c69c5103340155e3fd28fee80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB7	5316 bytes
`font_01_sfnt_off000071ba.bin` `3080117515302a5bb5591eb8a1127e021b89f7561a32ffb65d41729bc790cd0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71BA	10016 bytes
`font_02_sfnt_off000093e1.bin` `5bb2a7a6380d1dfafb539ecff73d32ebbe261088a673e400f34aca4fbad20734`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93E1	16152 bytes
`font_03_sfnt_off0000a8e6.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA8E6	4324 bytes

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