PDF malware analysis — malicious · a41678e672aa839d

MALICIOUS

PDF

47.5 KB Created: 2020-09-04 13:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 260fba0408ba28fa8234f9696e51198f SHA-1: ffa3aaa8b78691fb7e0e90982c91246509947af7 SHA-256: a41678e672aa839d566c98bacdaf08b15dc48a1d35aa7d5e6f8707a7f551d3d2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO LINK FARM'. One of these links, 'https://ttraff.club/wix?keyword=accuphase+e270+manual', points to known malicious redirector infrastructure. The primary purpose appears to be to lure users to external sites through a deceptive link farm, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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.club/wix?keyword=accuphase+e270+manual
- https://static.usrfiles.com/ugd/defcb2_c484b586f6024b7a99e7dfb450362257.pdf
- https://static.usrfiles.com/ugd/b8c837_ae687eb180344d3eaef7c102e578803f.pdf
- https://static.usrfiles.com/ugd/70c1f8_0b206a208d4a44778f4820f68e591c3d.pdf
- https://static.usrfiles.com/ugd/299074_dd5b4bb94eef4b2582e82bac75c96204.pdf
- https://static.usrfiles.com/ugd/ca300b_5adb672b43de4a819247c33198849fb5.pdf
- https://static.usrfiles.com/ugd/1849a1_4bc0619afa164063b066a9949ff98c0d.pdf
- https://static.usrfiles.com/ugd/80fd5d_ea51819dba874da3969cb14b2209c78b.pdf
- https://cdn.shopify.com/s/files/1/0432/1555/2672/files/1921190042.pdf
- https://cdn.shopify.com/s/files/1/0431/2471/9773/files/pokujiv.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdf
- https://cdn.shopify.com/s/files/1/0433/4272/5275/files/33595667529.pdf
- https://cdn.shopify.com/s/files/1/0433/8604/4572/files/dnd_5e_lay_on_hands.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_off00007ca8.bin` `1aecb8df645c803ced375b89cdcf2b7e66e7dc26f3d6b01388e7643211cf5a5a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CA8	5420 bytes
`font_01_sfnt_off00008efd.bin` `fdde52131b039ced834584fc21792b9d1d3e12fb6550fca361a8ececaba523fa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EFD	10012 bytes

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