PDF malware analysis — malicious · d71b78afc867ca49

MALICIOUS

PDF

42.5 KB Created: 2020-09-08 00:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bca869baa0bbd1910e2300178dbbedcb SHA-1: 6085a0ffd25220910958106a96fbb14b15895c03 SHA-256: d71b78afc867ca49c6d0313acba2f4306ffc807fb55b435baac7380be5da1bea

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=contacts+waiting+to+backup+android'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'contacts waiting to backup android'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination. 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.club/wix?keyword=contacts+waiting+to+backup+android
- https://cdn.shopify.com/s/files/1/0431/8360/3876/files/36047408133.pdf
- https://cdn.shopify.com/s/files/1/0434/6055/9013/files/dsei_2020_exhibitor_list.pdf
- https://cdn.shopify.com/s/files/1/0437/1641/1547/files/40419639590.pdf
- https://cdn.shopify.com/s/files/1/0450/2568/9758/files/integrated_intel_graphic_media_accelerator_950_driver.pdf
- https://cdn.shopify.com/s/files/1/0431/7757/4551/files/kovuburimupezibixigifa.pdf
- https://cdn.shopify.com/s/files/1/0438/4748/3557/files/autodesk_inventor_2019_handbuch.pdf
- https://cdn.shopify.com/s/files/1/0437/2342/3912/files/kunivalazugazor.pdf
- https://cdn.shopify.com/s/files/1/0434/2287/5800/files/guwunag.pdf
- https://static.usrfiles.com/ugd/e73fea_f2292b511d6242a9a7636cda79629830.pdf
- https://static.usrfiles.com/ugd/b8c837_46097ce2206045ce97267481e2a31680.pdf
- https://static.usrfiles.com/ugd/bb3bf9_11be6fffd6cd40e1b40a8cbca4b98f78.pdf
- https://static.usrfiles.com/ugd/432b07_3071fb810a7b4a88815ab771f32f3a67.pdf
- https://static.usrfiles.com/ugd/a48928_62acb8fa3a734411a4d7873a32e790c4.pdf
- https://cdn.shopify.com/s/files/1/0433/5550/4795/files/dracula_untold_2_full_movie.pdf
- https://cdn.shopify.com/s/files/1/0437/6795/5610/files/panojojofupawaxub.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_off0000671b.bin` `06e98b9d0713c077a3c717dac9be7845445ea66ef1a9b38ab456263a3a55c39f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x671B	5408 bytes
`font_01_sfnt_off0000799a.bin` `819ba2cc98cc8b14539bf444b8e63b7fff95f51cb75e59f4bceb5bba4d7656ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x799A	10740 bytes

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