Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6878a578b541a9…

MALICIOUS

PDF

53.9 KB Created: 2020-11-01 10:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82fb46029c7c38caca01a0a07b267049 SHA-1: 78d916a4f70f39aea09c41879a439d33101397c8 SHA-256: 1c6878a578b541a9834fa6f5a66fef0e8186656fae5e380d04f1e2be980e1802
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to scholarships, but its primary function is to redirect users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the embedded link at https://ttraff.ru/123?keyword=scholarships+for+high+school+seniors+2020 is known to be malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broader campaign to distribute malicious content.

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/123?keyword=scholarships+for+high+school+seniors+2020
    • https://nadosivilir.weebly.com/uploads/1/3/4/3/134316305/6271631.pdf
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/foxoxujiroluzi.pdf
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/vejosopamitido.pdf
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/xetikigavugekisesis.pdf
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/misutus_naxazuwodabif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5886f211-6b6d-49f5-9997-be0ad6e3f4f9/printable_44_phonemes_chart.pdf
    • https://uploads.strikinglycdn.com/files/6b3c2b01-06b7-4789-b90e-18a3fa93fbc0/jagemajasozojotolazo.pdf
    • https://uploads.strikinglycdn.com/files/03049e21-abaf-4251-9c93-6d53a5e66f95/urge_basics_manual.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/vefeligis.pdf
    • https://cdn.shopify.com/s/files/1/0498/0287/0947/files/14034871580.pdf
    • https://uploads.strikinglycdn.com/files/c42e974f-b5b9-44df-bb72-1e6270bd719a/69561126076.pdf
    • https://uploads.strikinglycdn.com/files/6b5df2d6-c50a-4839-b59f-33b02dc4847e/24310789549.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_off000093ab.bin
d574811bc0cdf3dda8832103fdf2f2e1ae06d61bf8fe2f33b86148a1724434b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x93AB 5652 bytes
font_01_sfnt_off0000a6e9.bin
36fb539d506a66967cbd07de44065dd4e575a46019dc0e7e0550bb86c155339a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E9 10532 bytes