PDF malware analysis — malicious · 6d4bdc9b1aacb0a3

MALICIOUS

PDF

35.0 KB Created: 2020-08-31 02:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 71718e95483aeaf233a25a00cb9bd7da SHA-1: c3ba34fd3a6274557fdeccf1532ce11386ce7f2a SHA-256: 6d4bdc9b1aacb0a3a0e90a3c8b19358b4d156250c6a145abad0ef98ddb994d1f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the PDF is designed to lure users into clicking malicious links, 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/wix?keyword=accordion+music+sheet+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/3439/5295/files/gta_v_private_dance.pdf
- https://cdn.shopify.com/s/files/1/0433/1926/3397/files/zobenimesaled.pdf
- https://cdn.shopify.com/s/files/1/0430/1442/2687/files/chegg_ereader_to.pdf
- https://cdn.shopify.com/s/files/1/0432/7397/8011/files/2018_honda_accord_2._0_performance_parts.pdf
- https://static.usrfiles.com/ugd/b8c837_3a157940a3f544febec2083513d0072b.pdf
- https://cdn.shopify.com/s/files/1/0431/9041/9620/files/mupidugeno.pdf
- https://cdn.shopify.com/s/files/1/0430/6858/8194/files/renaissance_art.pdf
- https://cdn.shopify.com/s/files/1/0431/7554/2950/files/mtg_arena_crashing.pdf
- https://cdn.shopify.com/s/files/1/0440/8092/2789/files/hot_tea_maker.pdf
- https://cdn.shopify.com/s/files/1/0439/6518/6206/files/ctet._nic._in_answer_key_2020_download.pdf
- https://static.usrfiles.com/ugd/04e6f9_76bf9f7334424918ba1268e2351716d5.pdf
- https://static.usrfiles.com/ugd/b8c837_455f551428b740809a72f88b29ea7ddc.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_off00004fd7.bin` `90e491419aeb7fa61f4f7ae1f80254652079557b2b5f9f32fc204c8f0a6d3561`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4FD7	5144 bytes
`font_01_sfnt_off00006123.bin` `87c59624c795ae0ae0967eae3fce3fc5d3ab288d2b175e5e1be2e2717bc5017a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6123	9028 bytes

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