Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fcb68bce12d5d8…

MALICIOUS

PDF

61.4 KB Created: 2020-08-29 20:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13376163c40a0995ba2643a842629d5b SHA-1: 1d3e00be8dfb94775279f6a4cea5178f50fda801 SHA-256: c5fcb68bce12d5d81e7c584ef4c8fa9319f34dcf5f5f28821babe8aabefe105d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The embedded URL, https://ttraff.cc/wix?keyword=jolly+q4+turbo, is likely the initial lure to a malicious site. The document body contains garbled text but also includes the same URL, reinforcing its presence. The file also contains a large number of external PDF links, many pointing to static.usrfiles.com, which is flagged as a link farm.

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=jolly+q4+turbo
    • https://static.usrfiles.com/ugd/70a38d_976d9b50446943d08464c3900ec73f4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d5c156f420f4fbab58e508c15a4dbc7.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_10e2533ba2304f988a58457dabd953ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_1323afbf5d63474986d1bf792f06744d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fd49c83dee04e82a9ad8695ef5cdc45.pdf
    • https://cdn.shopify.com/s/files/1/0460/1351/3889/files/blender_3d_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/6377192735.pdf
    • https://static.usrfiles.com/ugd/b8c837_529e85e8eafa4c27acd767bef33f89b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_31acf244f30c48d9ba84016a7ceea100.pdf
    • https://static.usrfiles.com/ugd/b8c837_128d2447e7e54244b1d2e2b62307664e.pdf
    • https://static.usrfiles.com/ugd/93c935_19b531a975e84f698789ed296dc62f30.pdf
    • https://static.usrfiles.com/ugd/07625c_4db61924467743a6b0bd98159c7a4afb.pdf
    • https://static.usrfiles.com/ugd/cac9e4_d11a69a2a900469a939084d68a6d7937.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086a0.bin
ef22abe44d471cd6a3ca3474f8cc371443823503d620203c4d5aef5de547577c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A0 4048 bytes
font_01_sfnt_off000094ea.bin
6ae1811e0c4beb9e68e6cf2f2a24b66647932eac193c71f4e0bbba1a953c3b50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94EA 4736 bytes
font_02_sfnt_off0000a52a.bin
979e0859e76093b7b1c2ff9bc551d2c9ec90c2084b2bb80614f8d06e7947be7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA52A 14852 bytes
font_03_sfnt_off0000d372.bin
ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD372 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.