PDF malware analysis — malicious · 1e654a1f9876353b

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 20:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 390b1cd46b3fb583e93057dc889e6e61 SHA-1: 8aa05b8c52db2caaba1bcb342c9fd5c7b425030d SHA-256: 1e654a1f9876353b3d7a4441fbf1ba688ca766e347bceb83c0008ecb3305b2ca

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.club/wix?keyword=candlestick+chart+patterns+cheat+sheet, which is likely the entry point for a malicious chain. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=candlestick+chart+patterns+cheat+sheet
- https://static.usrfiles.com/ugd/68ec51_fe9739b0ec4443f49973e2fdd2e0b933.pdf
- https://static.usrfiles.com/ugd/b65acf_1b01b63656964c23bdf9a07751cfd0e0.pdf
- https://static.usrfiles.com/ugd/b8c837_f5d37feffc15469badd09f3a45dd958d.pdf
- https://static.usrfiles.com/ugd/51c472_d17bb3fde27f4ab6aa210eb6e4da1055.pdf
- https://static.usrfiles.com/ugd/5b5da7_761e3cf2fbb346349cc65430f71d1610.pdf
- https://cdn.shopify.com/s/files/1/0464/9562/9464/files/53810599148.pdf
- https://cdn.shopify.com/s/files/1/0429/6382/8895/files/76231820738.pdf
- https://cdn.shopify.com/s/files/1/0427/4061/3286/files/46720977540.pdf
- https://cdn.shopify.com/s/files/1/0433/0058/5636/files/mu_origin_hack_android.pdf
- https://cdn.shopify.com/s/files/1/0429/8371/9071/files/lambeau_field_weather_report.pdf
- https://cdn.shopify.com/s/files/1/0431/7223/3376/files/21494893801.pdf
- https://cdn.shopify.com/s/files/1/0431/8176/8872/files/logical_analysis_questions_and_answers.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_off00006cb0.bin` `976eea563a245483415831a9c06bc32fe09a550ac3cd85c1857c09ff7cbc867b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CB0	5132 bytes
`font_01_sfnt_off00007e16.bin` `d8c53355e152953fcca93d16529a36d89da6cbd8958eaeb5977593756edc3e05`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E16	9932 bytes

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