Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bb969f8828e8ec…

MALICIOUS

PDF

32.1 KB Created: 2020-08-15 16:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85a34437c5c124ecb7e721a67a5fdf64 SHA-1: 2025424364c7462011a9de0cda2474169a25ba3a SHA-256: 74bb969f8828e8ecc63e6ebc35e70036376ffa551c7abc0c906d293da3526e22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.com/wb?keyword=fisica%20nuclear%20y%20de%20particulas%20ferrer%20pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to potentially harmful content, likely for SEO manipulation or to distribute further malware.

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.com/wb?keyword=fisica%20nuclear%20y%20de%20particulas%20ferrer%20pdf
    • http://fozoda.yellowhouseherbs.com/uploads/1/3/1/3/131379803/delibadegojud_jojase_jogikipizegasar_pavef.pdf
    • http://maduwemop.sacredquest-peru.com/uploads/1/3/0/7/130776485/071fd.pdf
    • http://files.myabigails.com/uploads/1/3/1/4/131453902/lumekadi.pdf
    • http://files.anchorchurchelpaso.com/uploads/1/3/2/7/132740905/tunudaji_fafutifekuda_kazofefef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/kijowabapifogarawel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/lidosikozosiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/18738754671.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/bopogukixutudu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/anonymize_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/paxifemekaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/tonodurosixeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/98697552157.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_off00004131.bin
b3b0999159e182b3e2801c3c83a83b424359466ae900b92c209f23808799e9ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x4131 5204 bytes
font_01_sfnt_off000052f0.bin
0ee052f4d5e97bf45500c4fd1d3e63c6ee8cabf15e2eaed628e0657664167fe9
pdf-font-stream PDF embedded font (sfnt) at offset 0x52F0 9464 bytes