Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48494b056e79368…

MALICIOUS

PDF

51.8 KB Created: 2020-09-01 02:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ffd100a486302ac397146284dc4feaa SHA-1: 9a02be73e457baedcabfdc4a15f9b41dd5da2b17 SHA-256: d48494b056e7936847c24e94bbf59d92b60032d97e5aa6078ae7813de342aee0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=analyzing+data+on+tuskless+elephants+worksheet'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external links hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to lure users to malicious infrastructure.

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=analyzing+data+on+tuskless+elephants+worksheet
    • https://static.usrfiles.com/ugd/6cfc61_5f747ca93a174b1daef70600561d41f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_14c275f930da4d76a72b6801cb0b5200.pdf
    • https://static.usrfiles.com/ugd/6f9b04_8a9cee97387a4688b634e6d8ddb5551a.pdf
    • https://static.usrfiles.com/ugd/834936_7f16c69b12644691ad724c2626a707cc.pdf
    • https://static.usrfiles.com/ugd/09273f_387e71793b374b5fb06faae9ca0e96e9.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_9cb7f12a170c424ca14590a9dc9a3116.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8887/files/70307221145.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/holographic_laser_projection_technology.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/58470609828.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/bumoxewunum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5586/5242/files/befikowezup.pdf
    • https://static.usrfiles.com/ugd/0dd040_cdfd1b53ba5443ccb12377412629e829.pdf
    • https://static.usrfiles.com/ugd/b8c837_107871a511b54473afb38051ef128d10.pdf
    • https://static.usrfiles.com/ugd/7ff653_242a3ad2cc0d48908611d6f0a606a66e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d3cd954f1da4bada83340c99be8475f.pdf
    • https://static.usrfiles.com/ugd/cf79db_e852570f361348e6980d62af258b827b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f7.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 2828 bytes
font_01_sfnt_off00008af1.bin
de0369cee34c801efecbf6c5f6d77cbe2d55af3ed261fafcb976dbb54b45fcdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF1 5520 bytes
font_02_sfnt_off00009dd6.bin
010c8476cf4d45ee74b1a7e3ae877dfd4f8415417e08e8153645bff7255a041e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD6 9776 bytes

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