Malicious PDF — malware analysis report

Static analysis result for SHA-256 03530547ce0612c9…

MALICIOUS

PDF

48.7 KB Created: 2020-09-04 19:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f9d29591331f26fae3efef04ac40949 SHA-1: dc5e9176c0fb068dc15aeae05a1803ec07355920 SHA-256: 03530547ce0612c9ae685ccbdcdb23c03355ae3890780f10218ef1bcefe52f46
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to academic schedules and a URL that mirrors the malicious redirector, suggesting a lure for educational content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=cbse+2018-+19+date+sheet+class+10th
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_e31d2145ce634a5995cfab1fcd8bc3e9.pdf
    • https://static.usrfiles.com/ugd/fef806_a8b500fc1cc34c648505ab2ad416b698.pdf
    • https://static.usrfiles.com/ugd/e5a943_a5902fdb96ed41d591adf25d271963a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.pdf
    • https://cdn.shopify.com/s/files/1/0438/9945/3608/files/boxuvetidizikegare.pdf
    • https://cdn.shopify.com/s/files/1/0464/7092/2390/files/application_android_carnet_de_voyage.pdf
    • https://cdn.shopify.com/s/files/1/0435/8530/6782/files/piluteje.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/48686746274.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/javitoko.pdf
    • https://static.usrfiles.com/ugd/05301a_f9b3f2ab97e54270acabe499905a921f.pdf
    • https://static.usrfiles.com/ugd/868401_e76817ad0d54432da959d85837eae721.pdf
    • https://static.usrfiles.com/ugd/3c2969_bc318c63b7694f05bc3c109a841c8833.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_89fec3954170452d98954fe3e4451bc5.pdf
    • https://static.usrfiles.com/ugd/cfa91a_54c2cb2405f04afb989915b11df497a0.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ee.bin
2f311206d706e314acc438d4c1883ca928f69e88721d02b0021507d697f93720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EE 5328 bytes
font_01_sfnt_off00007a0e.bin
a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0E 1936 bytes
font_02_sfnt_off00008353.bin
7f8932ade3ad53387c00b7770047920278cef98231791d4680f78cdb0e90770d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8353 10604 bytes
font_03_sfnt_off0000a780.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA780 4324 bytes

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