Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3fd73f4f422792…

MALICIOUS

PDF

39.8 KB Created: 2020-09-05 18:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c883a526d37df77ed781cade0c4fd095 SHA-1: 914a4431e65c72758448ed61a1322c4614d8cd3c SHA-256: bb3fd73f4f4227920d6aa01e8e10360a3680675af9b8d1e224a0ea8bdb056057
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains text referencing 'The Carrie Diaries' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of multiple embedded links, including a link farm, further supports a malicious intent to redirect users to potentially harmful 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=the+carrie+diaries+imdb+parents+guide
    • https://static.usrfiles.com/ugd/77941b_09075af22f85455b881d21d2bf6de7e9.pdf
    • https://static.usrfiles.com/ugd/191a6d_f48eac7b16f149b9a9dec1fbd2ca947b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f13a905ecaf43fab28eb0a4a827fa9c.pdf
    • https://static.usrfiles.com/ugd/b41a9a_930f5377f3df418ca373525630f6186d.pdf
    • https://cdn.shopify.com/s/files/1/0465/0601/6918/files/kumbida_pona_deivam_video_song_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5441/files/dumepezokaxulefej.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/sizivoma.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/chakravyuh_full_movie_free_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/55333638012.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/21489978016.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/14685914518.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1353/0019/files/buzawitibuxa.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_off00005df1.bin
640af2b6546f503022fd401d5c9c9f29eac9f25a9aafeae3c18af3b298d8aeb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF1 5544 bytes
font_01_sfnt_off00007096.bin
de2ae9c5ed6bc4d81fb720d797bf8eb1c3de3e3f50badc41f120823046f2bd65
pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 9932 bytes