Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acc2ecbf3d8058f…

MALICIOUS

PDF

67.5 KB Created: 2020-08-30 22:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba69a2045a6d2da4f5ec7070dc49c824 SHA-1: 2a1017acf29435fff51159d7b06c1feb6ecc1ebe SHA-256: 0acc2ecbf3d8058f5c1e63db2b787883de4611f7001749a0303b57885d1d1cae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to 'beard trimming guide tool' and the malicious URL, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=beard+trimming+guide+tool
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/57c819_b3850f66b34a43aa83ed69e4f2928874.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e04b37cf8234c69b4a55d7882f1f717.pdf
    • https://static.usrfiles.com/ugd/b8c837_682d915c828e49ccae42f5eabca10abc.pdf
    • https://static.usrfiles.com/ugd/b444d4_5b9c8aeae45343228179ff902c1cdd3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e036c0224e99419488018ef3f52f9593.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8bb3b6efe8d4c31b864064d81324398.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_b887b648277d431e885ccb97cc0df1cc.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/new_desh_bhakti_song_2019_dj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/54957872296.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/chakra_meditation_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/english_phonetic_symbols_in_khmer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2102/3904/files/2_atoms_and_elements_worksheet_answers.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccb8.bin
2cbe140c3eec2678a7512ec3c10519567d4dc21f020ac8148460e60b919b9009
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB8 5016 bytes
font_01_sfnt_off0000ddad.bin
88d96c9af56b799f771aad624d176839cfe71f9040c7efbc1ae5f048ed2c97b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 10352 bytes