PDF malware analysis — malicious · a741e7b76e266ed1

MALICIOUS

PDF

32.4 KB Created: 2020-08-17 05:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2e6cda6b26636cfeab50b05156b33b2c SHA-1: e38a24b316ae282fd1f1d40499d5ce41b74e8aa8 SHA-256: a741e7b76e266ed13eb9be12e212616d2fb76ead12df565230369ce8c589bde0

152 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 'ttraff.ru'. This link is presented within the document body, disguised as a 'ministry of finance indonesia annual report'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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/pify?keyword=ministry+of+finance+indonesia+annual+report
- http://files.vogelnest.co/uploads/1/3/2/6/132681823/kosafegukawasomitiro.pdf
- https://cdn.shopify.com/s/files/1/0432/5723/3576/files/nepowalegepiraw.pdf
- https://cdn.shopify.com/s/files/1/0431/2009/9488/files/30651967905.pdf
- https://cdn.shopify.com/s/files/1/0439/4126/5566/files/3380747481.pdf
- https://cdn.shopify.com/s/files/1/0437/6546/5245/files/19214337726.pdf
- https://cdn.shopify.com/s/files/1/0435/4444/5092/files/rumoxizubuz.pdf
- https://cdn.shopify.com/s/files/1/0438/0049/4237/files/iti_online_form_2018_admission_delhi.pdf
- https://cdn.shopify.com/s/files/1/0438/0301/7373/files/20115312320.pdf
- https://cdn.shopify.com/s/files/1/0432/9222/9787/files/67092457835.pdf
- https://cdn.shopify.com/s/files/1/0433/3505/7559/files/sql_server_2012_express_edition.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.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_off0000423a.bin` `b68dc30864addbafcbd23900e5d0db37c8913120ccb0de1282bc2479b3f6d1bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x423A	5256 bytes
`font_01_sfnt_off0000542c.bin` `5a1e193e15532b30be533ea2772f5a6fffc8afca9155f7d42d1040d49586c334`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x542C	9676 bytes

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