PDF malware analysis — malicious · b6547311ac891825

MALICIOUS

PDF

37.3 KB Created: 2020-08-30 22:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: deb9ad96549cf0a04459cf6a219884cc SHA-1: 028527500981f67d21c988ea254675c7c751d287 SHA-256: b6547311ac8918252322ef8b2a432ac2da7d3aaae7cc02732fe883758bdd86f9

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware-hosting site.

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.cc/wix?keyword=guidelines+for+hazard+identification+risk+assessment+and+risk+control+%2528hirarc%2529
- https://static.usrfiles.com/ugd/b8c837_fd55ff76e2d7412887c5dc4db07dd133.pdf
- https://static.usrfiles.com/ugd/bae363_0dd94826f8c7446d84cf323c5bd9db18.pdf
- https://static.usrfiles.com/ugd/b8c837_c1c55af24b0a4521af701ff3025378bd.pdf
- https://cdn.shopify.com/s/files/1/0437/1070/9913/files/wupagibokemodabasumefek.pdf
- https://cdn.shopify.com/s/files/1/0438/4122/4861/files/14317307978.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
- https://static.usrfiles.com/ugd/b8c837_5812db5b555941eab2015804c31a046d.pdf
- https://static.usrfiles.com/ugd/865d50_6c73b361ce1a4cafb031bf9f0e2b61f5.pdf
- https://static.usrfiles.com/ugd/b8c837_51e18f378204404bb747b8fc34048345.pdf
- https://static.usrfiles.com/ugd/b8c837_4887ac9c92e94fc5863722ec49a8ce1b.pdf
- https://static.usrfiles.com/ugd/b8c837_347cf763950a493295616fa879c9376d.pdf
- https://static.usrfiles.com/ugd/b8c837_f170773b2dcb4a60885592f60fba76f2.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_off0000532a.bin` `35bd5bab6a924ddfbb2abe69e5b9829a9e1a7e6b636a1136a2cd4586b66fab19`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x532A	5560 bytes
`font_01_sfnt_off000065f8.bin` `1630775f539216dea578ed3919fa82c6400d791bec038d15d3eb53ebfd1032be`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65F8	9856 bytes

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