Malicious PDF — malware analysis report

Static analysis result for SHA-256 e776f422aa53e135…

MALICIOUS

PDF

36.4 KB Created: 2020-09-10 04:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 378626d2a3c3e14e4a2ee23ee3c0e744 SHA-1: 59d2f7c22730851e4958e3051d936b67e0b4e8f3 SHA-256: e776f422aa53e135851c0f3a2833ba28ebe0d1557b62e269cf8489a534fe1196
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=konica+c454e+driver'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external PDF files. The document body, though heavily obfuscated, contains the same malicious URL and references to driver downloads, reinforcing the 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.me/pify?keyword=konica+c454e+driver
    • http://files.parentuniversitynrp.org/uploads/1/3/1/3/131379832/gexawuguxidarew.pdf
    • http://files.hcindiansbasketball.com/uploads/1/3/1/6/131606367/sufobogem.pdf
    • http://files.arcticaudio.com/uploads/1/3/1/8/131871477/pizokilafeza.pdf
    • http://files.michellexiao.net/uploads/1/3/1/6/131607346/xugex-xotosuzunixovir-kuvareduxifo-fufetatarifu.pdf
    • https://cdn.shopify.com/s/files/1/0463/3414/8763/files/affidavit_of_guardianship_form_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/anterior_tibial_tendonitis_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/85694368973.pdf
    • https://cdn.shopify.com/s/files/1/0457/7093/2390/files/microsoft_teredo_tunneling_adapter_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/giteta.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3222/files/zafejerekakotofevi.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_off00004c1e.bin
5e533dcd801f728bd8c0cc4384d9e153fffd5bc9153e7c273f9a362ee5e92c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1E 4964 bytes
font_01_sfnt_off00005d2d.bin
bc35857ff9be666bd689ce69e3e7129f5b02c003d0b9c636573c935bb74a6a53
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2D 12592 bytes