PDF malware analysis — malicious · bd293d22a0565aab

MALICIOUS

PDF

67.6 KB Created: 2020-08-05 03:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a680d4cb2cbe4d8cc35678bd0254d8f9 SHA-1: ce6591f7d9b03f8fac57f1a4a12ab8348d7af11a SHA-256: bd293d22a0565aab6099e579c828bcb5b20678d2971c6ee6d07573f0fd82869d

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.cc/pify?keyword=null+and+alternative+hypotheses+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the lure.

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=null+and+alternative+hypotheses+pdf
- http://files.savvytravelsisters.com/uploads/1/3/2/6/132681647/e5e7a73a.pdf
- http://files.nanaimotreeservices.com/uploads/1/3/1/1/131164324/pazas.pdf
- http://files.lovelifeagain-lifecoachingmore.com/uploads/1/3/2/6/132695416/2524687.pdf
- http://files.tonchairs.com/uploads/1/3/0/8/130814032/f84bab21ba018f.pdf
- https://cdn.shopify.com/s/files/1/0432/8062/9913/files/fogotubetobi.pdf
- https://cdn.shopify.com/s/files/1/0430/4178/3959/files/zatigobudu.pdf
- https://cdn.shopify.com/s/files/1/0430/5823/3493/files/93411068325.pdf
- https://cdn.shopify.com/s/files/1/0433/3076/4968/files/34349852686.pdf
- https://cdn.shopify.com/s/files/1/0438/6773/4176/files/wasipekowexadotubepidaki.pdf
- https://cdn.shopify.com/s/files/1/0433/7372/3800/files/jejunagofuxotapapitesape.pdf
- https://cdn.shopify.com/s/files/1/0431/6656/4503/files/butusezuwujaniwomur.pdf
- https://cdn.shopify.com/s/files/1/0428/1883/0492/files/guwedizepi.pdf
- https://cdn.shopify.com/s/files/1/0431/0591/0933/files/71026813431.pdf
- https://cdn.shopify.com/s/files/1/0436/9743/8875/files/vijedivikex.pdf
- https://cdn.shopify.com/s/files/1/0432/9606/3643/files/fiduvuzo.pdf
- https://cdn.shopify.com/s/files/1/0438/2906/7938/files/72574219461.pdf
- https://cdn.shopify.com/s/files/1/0434/2608/7064/files/sagikadi.pdf
- https://cdn.shopify.com/s/files/1/0431/2052/5469/files/gabaxamerekaxaj.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_off0000c925.bin` `87b97876d340c40a80a84aef14d30ac3546d213759b635caf363571c9d46d2fc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC925	5260 bytes
`font_01_sfnt_off0000db14.bin` `8d508251fca67a82f658648727683ccfd9895b57267ea85b0740cb78e29aa524`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB14	11056 bytes

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