Malicious PDF — malware analysis report

Static analysis result for SHA-256 746740f5135e287e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 03:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da5c0a8109447eb055cea8d49aa3df62 SHA-1: e74819efae74d6be37be9609c1b33aee7fb95150 SHA-256: 746740f5135e287e835243f0779fa7589cb1f90899d0a7723700aa79138cbc18
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, and one specific URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure related to 'pandora one hack android'. The ML classifier also strongly indicated maliciousness. The presence of numerous links suggests an attempt to drive traffic to malicious sites, potentially for phishing or SEO spam.

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.ru/wix?keyword=pandora+one+hack+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d17951_8a9db86e94954a589ef10bac41b4e69a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a42262263df4cbd8bf878a3eda5f33c.pdf
    • https://static.usrfiles.com/ugd/defcb2_2849c48aeaff43f9ae18ef9bf044fc7d.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_db635500abbf47c5a71e66ecee4557f7.pdf
    • https://static.usrfiles.com/ugd/fb5067_0c958a609941405e898f5098b6a59fd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d2c3bb36f12404e811aa3ac48835d09.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_c2a9538d1ea140fea3d2c0921d00cb99.pdf
    • https://static.usrfiles.com/ugd/b8c837_9aededc51e8842e38f48124ca1d670d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bc81f0787e741a5a383d8d43e162c4c.pdf
    • https://static.usrfiles.com/ugd/c0b427_3ce944b67c224de09963abfe4e015e9a.pdf
    • https://static.usrfiles.com/ugd/5438e3_d85fb4d1c3b748069cf3583693b123d0.pdf
    • https://static.usrfiles.com/ugd/516793_1eec57e8df194d1ca53eff410a76b7c7.pdf
    • https://static.usrfiles.com/ugd/d3758e_e2eae5e40ef0415cb3316f134a262232.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_0a0b5c31db0f4f64882627e4d60a8cbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aa831ffa1ee41eca5ec82483d40b280.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_off00006389.bin
f09108368034f177cbbb04dfb291a29fdfcd5152bb260f76346e5fad0a612f71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6389 4884 bytes
font_01_sfnt_off00007413.bin
f2c3ce03975e092f1243e2f9a1c0d5f69dd7d6f3b7ecf4b71e74d137f7c73637
pdf-font-stream PDF embedded font (sfnt) at offset 0x7413 10548 bytes