PDF malware analysis — malicious · c0df644d49b101ce

MALICIOUS

PDF

42.7 KB Created: 2020-09-02 08:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f0034b4a51f1521a1fb318792641bd33 SHA-1: 5e2607e0381524459c1b3fbace9fe2b18801cf7d SHA-256: c0df644d49b101ceca73af5777e8cbc666f878b9895b605a6a42182b8d927f00

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'business plan template for investors' and the malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the 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.ru/wix?keyword=business+plan+template+for+investors
- https://cdn.shopify.com/s/files/1/0435/1927/9258/files/zekoforobik.pdf
- https://cdn.shopify.com/s/files/1/0430/5682/4471/files/var_www_html_index._html.pdf
- https://cdn.shopify.com/s/files/1/0432/7076/6750/files/assets_and_liabilities_format_in_kannada.pdf
- https://cdn.shopify.com/s/files/1/0433/8830/5575/files/61055392050.pdf
- https://static.usrfiles.com/ugd/b8c837_57218dcf9dc4439c993db971d6dc7c39.pdf
- https://static.usrfiles.com/ugd/07e02c_cc1145756fc24270b6d311191311a2de.pdf
- https://static.usrfiles.com/ugd/09273f_96fc0497a74d440a96e8514052718afc.pdf
- https://static.usrfiles.com/ugd/a1fb72_4575b300a2444698b094ea2ff4a98039.pdf
- https://static.usrfiles.com/ugd/e33828_e44cbb27eb4141e49f706ad1145cf090.pdf
- https://static.usrfiles.com/ugd/bf650e_592b7770f4a14b448be0f22f3d2594c5.pdf
- https://static.usrfiles.com/ugd/b8c837_b012b1bd8bbb4e509d7b0874d4704213.pdf
- https://static.usrfiles.com/ugd/e3ed1f_3fec8587948643bf8ffb8b6fdcd398cd.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_off0000699b.bin` `6eaddaa29b10ec53191ec054039b8c749ae8f98ed282215705bb97bf2977d512`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x699B	5156 bytes
`font_01_sfnt_off00007b19.bin` `a0fbea2759d2e92211080d617f962ad00a2d08740c088840403dba0ca5f23734`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B19	10300 bytes

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