PDF malware analysis — malicious · f8881b4845beb7e7

MALICIOUS

PDF

50.4 KB Created: 2020-07-28 05:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7c64d878ba4c83e6c203e0bd8a47a55 SHA-1: e8a24afd987f374ae78fa88fc4f2ed616e14c25f SHA-256: f8881b4845beb7e7e537025ccb9fa06fc8462546b6531277b31c840ffa97c7b5

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used to obscure malicious redirectors. One critical heuristic firing confirms a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to host the malicious 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=appium+previous+versions
- http://files.pregnancylossinsilence.com/uploads/1/3/0/7/130739871/kinedatedivamupiwik.pdf
- http://files.biggreenadventuretours.com/uploads/1/3/1/4/131407281/bofagizu-rumoderobigenom.pdf
- http://files.newhavenluxuryapartments.com/uploads/1/3/0/7/130740022/478604.pdf
- http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdf
- http://files.joepeatfield.com/uploads/1/3/1/1/131164321/c64ea38b.pdf
- https://cdn.shopify.com/s/files/1/0436/9242/5384/files/vukamelajamusubodeve.pdf
- https://cdn.shopify.com/s/files/1/0431/0204/4316/files/4919474359.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdf
- https://cdn.shopify.com/s/files/1/0432/5690/5885/files/laganeretanirodefowap.pdf
- https://cdn.shopify.com/s/files/1/0434/4345/4102/files/18328298788.pdf
- https://cdn.shopify.com/s/files/1/0438/8116/9051/files/34109409430.pdf
- https://cdn.shopify.com/s/files/1/0435/5466/8705/files/rumaserefojapexarobukoluz.pdf
- https://cdn.shopify.com/s/files/1/0440/5988/5733/files/62199234725.pdf
- https://cdn.shopify.com/s/files/1/0433/3905/5253/files/61243531260.pdf
- https://cdn.shopify.com/s/files/1/0431/0705/7825/files/gekesovijotuxafi.pdf
- https://cdn.shopify.com/s/files/1/0433/0805/6740/files/zamadanekobufiwa.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_off00008447.bin` `0bf14f3ef2d3ae84485b2cd48ecf9b86bcdfddec4108ec48f5afb1ba70f8d93f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8447	4572 bytes
`font_01_sfnt_off000093a8.bin` `18dfc3a292f95debec6e3523a2b7a6dcd02004c8dce4590c29a9e59f8e2817fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93A8	12544 bytes

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