PDF malware analysis — malicious · 756d8e2de469f67d

MALICIOUS

PDF

33.7 KB Created: 2020-08-21 00:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cbeef1616b53d740278c79e5f42f78e3 SHA-1: d636884db9e46d4292671d878312e588cab590e2 SHA-256: 756d8e2de469f67d6026c0dbeb9950670733613eee3aba33e94a54fa7abbe7da

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm of 24 external PDF links, with the primary link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

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=solaredge+10kw+inverter+data+sheet
- http://kumolop.montrealbicycleclub.com/uploads/1/3/2/8/132814930/107303.pdf
- http://files.motivationalfoundation.com/uploads/1/3/1/3/131383434/ginevaredosu_pafupunew_ripikobuvi_liwesulaf.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/3889/0394/files/avira_phantom_vpn_apk.pdf
- https://cdn.shopify.com/s/files/1/0431/5339/1765/files/77492288585.pdf
- https://cdn.shopify.com/s/files/1/0452/2449/3213/files/semulote.pdf
- https://cdn.shopify.com/s/files/1/0430/3529/5905/files/10060026676.pdf
- https://cdn.shopify.com/s/files/1/0432/4337/2703/files/iterm_switch_panes.pdf
- https://cdn.shopify.com/s/files/1/0437/9466/1538/files/kezubezovelobemotalisol.pdf
- https://cdn.shopify.com/s/files/1/0435/7118/3777/files/retinopatia_diabetica_grados.pdf
- https://cdn.shopify.com/s/files/1/0428/2623/6071/files/lileg.pdf
- https://cdn.shopify.com/s/files/1/0437/3282/8314/files/58709730268.pdf
- https://cdn.shopify.com/s/files/1/0439/2583/1835/files/38553187563.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000457a.bin` `f3176806fec8807d5473026861e03bdf3a3a405128b24b52fb1eb31c7c0ff093`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x457A	5600 bytes
`font_01_sfnt_off00005898.bin` `f2513ad53ef7524d4bb5c25c8d3aa286dde819c6c8c2c80f43bfc92861b048e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5898	9764 bytes

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