PDF malware analysis — malicious · 8514bbd5f4c0109f

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 21:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7529ec9bb1ad5a6511d091e9baf26ce1 SHA-1: b4f6e39923e4039e6626f08a348ea35bf2c798f5 SHA-256: 8514bbd5f4c0109f66dc07700163d0efa196e36b611b1a7268b3e349b85b7686

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a search result. The document also contains a large number of links to external PDFs, likely for SEO manipulation. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

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/wix?keyword=mexican+restaurants+in+yuba+city
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/7513/3859/files/theoretical_aerodynamics_ethirajan_rathakrishnan_free_download.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
- https://cdn.shopify.com/s/files/1/0427/4031/8375/files/87550380.pdf
- https://cdn.shopify.com/s/files/1/0437/7437/8138/files/49468920488.pdf
- https://cdn.shopify.com/s/files/1/0436/4474/7929/files/2406803199.pdf
- https://static.usrfiles.com/ugd/2ac701_2936124796e3448d88149de890f29a35.pdf
- https://static.usrfiles.com/ugd/d5cf39_c2d3b6a54cbd4f1f8cf089ae712f220b.pdf
- https://static.usrfiles.com/ugd/628a76_83bd03fb55b444498c48bf551f706d16.pdf
- https://static.usrfiles.com/ugd/b8c837_574478db8c164d8684529770df75ca34.pdf
- https://static.usrfiles.com/ugd/b8c837_8e274c87c17b4c05b8a8f33dbef06cbe.pdf
- https://cdn.shopify.com/s/files/1/0429/9862/8501/files/fisozu.pdf
- https://cdn.shopify.com/s/files/1/0433/8024/4643/files/capital_market_reforms.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_off00004758.bin` `c0f2394ac28d8d24b4778d3cdd8f20fecc0d7fa1519c09c3caed02842af78db0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4758	5076 bytes
`font_01_sfnt_off000058b3.bin` `e34de4dae01159b2453f84c1d582bbd8d1248a1815775dd4a38537ddf4e83f5e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58B3	10012 bytes

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