Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f9184f6fde12e4…

MALICIOUS

PDF

41.1 KB Created: 2020-09-02 17:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfba99bcfcc65744721cbd6ae89f39ec SHA-1: 46ccf84b8440ce8fa89dfe7a5b830549f6ff23b0 SHA-256: f0f9184f6fde12e4a972e37c61a28a5d67eeefc7fc9ce19e549d7e24112debde
154 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.me/wix?keyword=android+auto+app+not+showing'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to this malicious site. The PDF also contains a large number of external links, flagged as a link farm, which is a common tactic for SEO poisoning or distributing 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.me/wix?keyword=android+auto+app+not+showing
    • https://static.usrfiles.com/ugd/4b874d_db30b8fea7aa46f088d223804ae641bb.pdf
    • https://static.usrfiles.com/ugd/538d67_102a15c5821245ba8ea2aec691d0b140.pdf
    • https://static.usrfiles.com/ugd/917232_e33f9ebee0834acaba8927e24a29f208.pdf
    • https://static.usrfiles.com/ugd/cafc24_0a7429e9c93847a69d07915997d3a69e.pdf
    • https://static.usrfiles.com/ugd/45e30f_03c8e007894c4e1e948c4c80363d1425.pdf
    • https://static.usrfiles.com/ugd/2f8cea_61b369813fd94f92894c725df645faa1.pdf
    • https://static.usrfiles.com/ugd/72b0e7_231b2162670443f494d72823ee6d0abc.pdf
    • https://static.usrfiles.com/ugd/a467d2_8980f061e6ba4a14b05a894a4118f250.pdf
    • https://static.usrfiles.com/ugd/5b9a87_adb5b4edb174409a8f16e11018ea90e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2da413f5cc3649dbbd2e5839352d23f0.pdf
    • https://static.usrfiles.com/ugd/145364_da7432bfa78b44aa9f9b4fb88fc15ea3.pdf
    • https://static.usrfiles.com/ugd/8ba634_06383d1511264a4c964538f7b172f868.pdf
    • https://static.usrfiles.com/ugd/8b49c6_bf2827403fe845aaab8a67cf95747f60.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.

FilenameKindSourceSize
font_00_sfnt_off000062cd.bin
0514b321fa6a83f8a36e8122f338ec82822dc76fffbe285bc411c514bf1c94a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD 5272 bytes
font_01_sfnt_off000074c7.bin
31d040734465e30612d44d526946d0ce76c44aea5d2e46ad5110e425c52f4c97
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 10472 bytes