PDF malware analysis — malicious · dfcd2cd1895ff445

MALICIOUS

PDF

55.2 KB Created: 2020-07-21 03:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06091111dabd0fd6702ff4fa6ef95f2e SHA-1: 99b37105d4baac52bbb77f3631e3324169b45e91 SHA-256: dfcd2cd1895ff445e75205cb0ecf6996d3aa933c171b4a04b89aee5bdf09c1fb

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a 'worksheet' lure. The primary attack vector appears to be directing users to malicious sites via embedded links.

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/pify?keyword=microscopic+structure+of+bone+and+cartilage+worksheet
- http://files.360signs.com/uploads/1/3/2/7/132712514/regal.pdf
- http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
- http://files.drjdechert.com/uploads/1/3/0/7/130738823/1ceb79.pdf
- http://files.northlinecattle.com/uploads/1/3/0/7/130776351/7456983.pdf
- http://files.ayeeprettyblack.com/uploads/1/3/0/7/130738548/3995609.pdf
- https://cdn.shopify.com/s/files/1/0430/3287/1074/files/15863129233.pdf
- https://cdn.shopify.com/s/files/1/0428/5726/7359/files/sumovonevorikonurukamapo.pdf
- https://cdn.shopify.com/s/files/1/0434/2962/6017/files/vosumeva.pdf
- https://mapikupe.files.wordpress.com/2020/07/raxizokekimukenegotan.pdf
- https://vosonowa.files.wordpress.com/2020/07/72293876643.pdf
- https://sajolesogiw.files.wordpress.com/2020/06/vitekojemarufeku.pdf
- https://nozikop.files.wordpress.com/2020/06/ripofunowotabi.pdf
- https://cdn.shopify.com/s/files/1/0431/2753/7828/files/puzozogomanomemonugeb.pdf
- https://cdn.shopify.com/s/files/1/0428/7427/3948/files/9308341533.pdf
- https://cdn.shopify.com/s/files/1/0431/6993/9612/files/vufikiwaderaf.pdf
- https://cdn.shopify.com/s/files/1/0431/2681/6932/files/jujerefixu.pdf
- https://cdn.shopify.com/s/files/1/0435/9146/7176/files/toxuwudisomajonuva.pdf
- https://cdn.shopify.com/s/files/1/0437/0844/8919/files/3977716987.pdf
- https://cdn.shopify.com/s/files/1/0429/1415/2607/files/10607772736.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_off00009943.bin` `7b0ac71d93e2fd6ec5aa08794122512d290d56fccf8adbac9175677cfc81bf07`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9943	5600 bytes
`font_01_sfnt_off0000ac55.bin` `9109a1130472e1a543ff6b8fb5c9fdc77c0894a90030ed2ac3d2dedd02437fa6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC55	10048 bytes

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