Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f823039675284e6…

MALICIOUS

PDF

70.9 KB Created: 2020-08-31 06:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f416d9b168416853767462785b219fc6 SHA-1: db87720ae943cdebcebca14a6d44032519bdd86e SHA-256: 2f823039675284e689bb0e75b2dbc9d93d0d18d4162ac4fede39aa454a53ef21
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a movie link. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious links broadly.

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=pirates+of+caribbean+1+full+movie
    • https://static.usrfiles.com/ugd/345929_05ce7d4f55d54d8d862e001a4bcf30d5.pdf
    • https://static.usrfiles.com/ugd/cac9e4_2acd5788ef48407ca15ada891de766d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb4433fd0fe14a9ca54dffeb2c565293.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddf15af9aa0248c1a4f9dcf97db101ae.pdf
    • https://static.usrfiles.com/ugd/b88e3d_1c938440f5234abe9533fd616f6145a4.pdf
    • https://static.usrfiles.com/ugd/f09a9d_387bc6ae6b7f495ea6d3b7f373728593.pdf
    • https://static.usrfiles.com/ugd/158fb9_bcce4230b6ed410bad1967e475b433ab.pdf
    • https://static.usrfiles.com/ugd/b47706_a62c8823e8bb473598bea2cb5a218772.pdf
    • https://static.usrfiles.com/ugd/e32576_35b88207b62a4891ba00fb06ea7cd68a.pdf
    • https://static.usrfiles.com/ugd/48f461_d0739dd666fb4837bc9b8d9649cfed15.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f35e69666394c26ba122993f94d4a6d.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/zeromutef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/sotinowozewofivowima.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8242/files/zivavebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/91303594967.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/naxus.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_off0000c7d8.bin
8b3f2f71a6139db573bbfe84f24057067b81a6ed00f171a47eb9fb40cbb40dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D8 5160 bytes
font_01_sfnt_off0000d953.bin
43240b3c036abc2791be6321c31e9080ed8afd21aa5bf7a288e94f82ad0f360e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD953 11772 bytes
font_02_sfnt_off00010064.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 4324 bytes