PDF malware analysis — malicious · e6173671ce9215a1

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 22:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bc98dcb8185f6063b97a6f0145ce4308 SHA-1: c989892a6ed1e5368ac03290808f653b13e99eee SHA-256: e6173671ce9215a169340619ad487dd1e61222c11db2d29f12ca31c71edf663c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=guion+cuento+los+tres+cochinitos+fin'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL indicates an attempt to lure the user to a harmful site.

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/wix?keyword=guion+cuento+los+tres+cochinitos+fin
- https://static.usrfiles.com/ugd/b8c837_e932bb83e56f44c2acd3c97be955dd67.pdf
- https://static.usrfiles.com/ugd/b8c837_c745da03750044f99e6ccb6407b391d2.pdf
- https://static.usrfiles.com/ugd/ac51ce_d75620fd215a4dca803e962109fb1543.pdf
- https://cdn.shopify.com/s/files/1/0430/8451/3440/files/69472986534.pdf
- https://cdn.shopify.com/s/files/1/0433/7362/5500/files/fufitutur.pdf
- https://cdn.shopify.com/s/files/1/0433/7994/9718/files/vevoxalifawasutumufa.pdf
- https://cdn.shopify.com/s/files/1/0431/0315/8433/files/74766769349.pdf
- https://cdn.shopify.com/s/files/1/0429/0638/6595/files/oxford_english_for_cambridge_primary_6.pdf
- https://static.usrfiles.com/ugd/b8c837_f0f6d74d10bc47bdb90ccbb503061549.pdf
- https://static.usrfiles.com/ugd/b8c837_37c0672c55984546a209a1b2c222cf94.pdf
- https://static.usrfiles.com/ugd/b8c837_ea840c07449841309ba662df1533cf19.pdf
- https://static.usrfiles.com/ugd/a76634_0851b6ccd698420384be79a348f8a9dc.pdf
- https://static.usrfiles.com/ugd/e6092c_89341ca841ae4cdd85b236cdb28758b5.pdf
- https://static.usrfiles.com/ugd/d54300_4983431d410a4d7e8fc5368357a2c9c6.pdf
- https://static.usrfiles.com/ugd/565485_bde634e7790e47ba846c1a5c9334e14b.pdf
- https://static.usrfiles.com/ugd/b8c837_f1688ae0d4854c749b564f0fb6d15fe0.pdf
- https://static.usrfiles.com/ugd/b8c837_e3893e123da54d9893a167f3cf863578.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_off00006686.bin` `1a1db24bc697ebc42b0f0205debed113c95975143ffaf95d728de9fa64120dbb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6686	4792 bytes
`font_01_sfnt_off000076cb.bin` `ec067ac5ccf5fa428888d96bd0fb8b9659a85c5f093b7a1dc1dc3fe77870a1fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76CB	11504 bytes

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