Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2ec1889f50c9f1…

MALICIOUS

PDF

35.3 KB Created: 2020-08-21 21:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f8bb2b3dd28d9e90d0ccc9e1c1e23cb SHA-1: 4460bffd48b19157f1e0733b99450b7854385281 SHA-256: 0e2ec1889f50c9f19f478a7701856ec43aac702f951b2f9c54304d083742f48c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=realistic+makeup+games+free`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into clicking it for a purported game download.

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/pify?keyword=realistic+makeup+games+free
    • http://files.onesaint.org/uploads/1/3/1/8/131856212/xuwefexol_pumuluwizuw_kidawuxegoxa.pdf
    • http://files.elementfloorco.com/uploads/1/3/1/3/131382346/joluze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/lexiletuzuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/14837747727.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/54733207652.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/supercalifragilisticexpialidocious_broadway_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/85072907394.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/morgan_anesthesia_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/easy_guitar_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/dubajaredilulowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/44883139818.pdf
    • https://cdn.shopify.com/s/files/1/0432/3442/7047/files/vusolimategusufuvagoguvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7741/7625/files/connect_4_education_music_appreciation_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/bonoxifop.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_off00004c34.bin
e85a248edf705794d137a199417ec21a85ffc153d0a0675db19adbe06aacb3e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C34 5408 bytes
font_01_sfnt_off00005e89.bin
2c94e21f5c99f16c35c515fe2478fc3d3822d856cc855647892046011b36c8a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 10024 bytes