PDF malware analysis — malicious · 9309c63c649616df

MALICIOUS

PDF

49.3 KB Created: 2020-08-07 03:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d547150cb0f48898abf61e410772248a SHA-1: c5686d91b9e19dfa82f3328b509aef46e00fb4b0 SHA-256: 9309c63c649616df921a97ae4b58f072eb1956a2d975ba85a3b170bbc597d156

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a link farm of numerous external PDF files, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users to malicious sites via embedded links.

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.com/pify?keyword=contenidos+factuales+conceptuales+procedimentales+y+actitudinales+pdf
- http://files.btccricket.co.uk/uploads/1/3/0/7/130740591/6101994.pdf
- http://wejujav.sonhslks.com/uploads/1/3/0/7/130775997/4044540.pdf
- http://files.lekeapena.com/uploads/1/3/1/6/131637211/1689983.pdf
- https://cdn.shopify.com/s/files/1/0428/7509/3159/files/65158858465.pdf
- https://cdn.shopify.com/s/files/1/0430/2117/2897/files/1393904678.pdf
- https://cdn.shopify.com/s/files/1/0434/7320/7446/files/99_magic_guide_rs3.pdf
- https://cdn.shopify.com/s/files/1/0433/9066/4860/files/97455548690.pdf
- https://cdn.shopify.com/s/files/1/0440/5090/7286/files/71002603886.pdf
- https://cdn.shopify.com/s/files/1/0433/3495/9263/files/w-_4_form_for_2016.pdf
- https://cdn.shopify.com/s/files/1/0432/4186/5375/files/81848133071.pdf
- https://cdn.shopify.com/s/files/1/0428/5480/9756/files/zejita.pdf
- https://cdn.shopify.com/s/files/1/0428/5458/0391/files/66513034341.pdf
- https://cdn.shopify.com/s/files/1/0440/1224/1046/files/pidosupipabopuw.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_off00008165.bin` `ae1e40b20fc2043ec64168057453f3659e1242c13a9cf787277d928f9ae7eba6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8165	5308 bytes
`font_01_sfnt_off00009363.bin` `1d97dba87b0e56d8861c0286688487844fc1956d086aa285ddaeb894492e6952`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9363	11324 bytes

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