PDF malware analysis — malicious · 4cf02ec1bd3b2a6c

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 16:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c1d39a82ef9ae99a370639421e30bcf6 SHA-1: da21e46a57a19527a8c3b5a13a011630682e45e2 SHA-256: 4cf02ec1bd3b2a6c67eddfb177f603f2fca93cac9102dee0a0837ec8b55c3b96

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a utility for merging PDF files. The document body, though partially corrupted, contains the same lure text and the malicious URL. The PDF also hosts a large number of external links, many pointing to PDF files on Shopify domains, suggesting a link farm or SEO manipulation tactic to mask the malicious redirector. 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.cc/pify?keyword=r%25C3%25A9unir+plusieurs+pdf+en+un+seul+document
- http://files.chemtutorsg.com/uploads/1/3/1/3/131398507/wosokagar.pdf
- http://files.afmemphis.org/uploads/1/3/0/9/130969452/gixovuxosojerosizi.pdf
- http://files.elementaryschoolcounseling.org/uploads/1/3/1/3/131379949/1939712.pdf
- http://files.ecocaregreen.com/uploads/1/3/1/3/131384468/pavefofat.pdf
- https://cdn.shopify.com/s/files/1/0438/2123/6381/files/serizasidaradegalezigej.pdf
- https://cdn.shopify.com/s/files/1/0428/2528/5791/files/84830884982.pdf
- https://cdn.shopify.com/s/files/1/0438/0845/6865/files/davamebedi.pdf
- https://cdn.shopify.com/s/files/1/0429/5956/9055/files/irs_form_8917.pdf
- https://cdn.shopify.com/s/files/1/0447/9628/0993/files/us_address_sample.pdf
- https://cdn.shopify.com/s/files/1/0431/8652/0224/files/rapudaxibafa.pdf
- https://cdn.shopify.com/s/files/1/0431/9051/7917/files/zutazakabetaj.pdf
- https://cdn.shopify.com/s/files/1/0432/8806/8254/files/jumolimonovuvu.pdf
- https://cdn.shopify.com/s/files/1/0428/9947/2550/files/minecraft_usernames_and_password_list.pdf
- https://cdn.shopify.com/s/files/1/0437/7467/3050/files/87725758117.pdf
- https://cdn.shopify.com/s/files/1/0429/6019/1637/files/85166854585.pdf
- https://cdn.shopify.com/s/files/1/0436/9573/4937/files/futonuxaxaxogemoxuvugus.pdf
- https://cdn.shopify.com/s/files/1/0430/1442/2677/files/vewijigusiwuraxegis.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_off00006290.bin` `6f205117eec1f81c0b371c86ceca1762bbf9a59655bf669bd3215eb85bee4d22`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6290	5240 bytes
`font_01_sfnt_off0000740d.bin` `d226a759e7ba2dcc4c3e2686e541b216f36b5803056361ca5df721b0c441fe1d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x740D	11672 bytes

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