PDF malware analysis — malicious · 41c060ebc795aa43

MALICIOUS

PDF

49.4 KB Created: 2020-08-18 16:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e0f338afae5a6a2025da247e349b20bc SHA-1: b7d9298081d7a8348ea03ec89216662b90007c6d SHA-256: 41c060ebc795aa4327cbc5b378726e439b7eb0a1f1007d1a502aac1656ce7063

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=atm+full+form+in+bengali'. The document body, though partially corrupted, also contains this URL and appears to be a lure related to 'Atm full form in bengali'. The PDF also hosts a link farm of other PDFs, many hosted on Shopify, suggesting a broad distribution effort. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=atm+full+form+in+bengali
- http://files.lymphomatolemonade.com/uploads/1/3/1/4/131452952/vudifebuwagikobobon.pdf
- https://cdn.shopify.com/s/files/1/0434/8909/9938/files/36632943158.pdf
- https://cdn.shopify.com/s/files/1/0434/8713/3860/files/animals_name_in_english_and_tamil.pdf
- https://cdn.shopify.com/s/files/1/0431/7990/1085/files/gawuxidomofologimisufexun.pdf
- https://cdn.shopify.com/s/files/1/0434/4555/1271/files/58352787956.pdf
- https://cdn.shopify.com/s/files/1/0429/8234/2815/files/89919958143.pdf
- https://cdn.shopify.com/s/files/1/0430/7599/3764/files/vurodiget.pdf
- https://cdn.shopify.com/s/files/1/0433/6254/9910/files/jikixi.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_off00004d8d.bin` `b8a7d842ee1fcafd9321588174b78bbb378ba6a698fa62a02c89f4ed96f2e1c3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D8D	5036 bytes
`font_01_sfnt_off00005e9f.bin` `f46affb9cc482563f7880970f6b4a034aacaa04c46a20d03d5d862c82a3d64fd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E9F	14944 bytes
`font_02_sfnt_off00008b9c.bin` `006f02259380e549fd7bb9a352802f6ac7441fd6fa8bbab670bb7617e2b4e70b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B9C	10500 bytes
`font_03_sfnt_off0000af23.bin` `d301078cf304410db7faf4d3626d2488c83dd6b699ab364cc976b7cdb65d823e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF23	2336 bytes

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