Malicious PDF — malware analysis report

Static analysis result for SHA-256 766b445ad8093fa7…

MALICIOUS

PDF

55.6 KB Created: 2020-08-17 07:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b125271e41b1c94c3646778dd887be8 SHA-1: a2f1041cc80ae5206d1b84219210c68b402a0091 SHA-256: 766b445ad8093fa7302e1e3299f9af778272e8b7aadcb6ca7cfb5e26ddf69dce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to a malicious infrastructure at 'ttraff.cc', suggesting an attempt to lead the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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=fistful+of+love+piano+sheet+music
    • http://files.planswpa.com/uploads/1/3/0/7/130739850/74ffde.pdf
    • http://files.triciabskincare.com/uploads/1/3/0/9/130969431/sifeduroxupo.pdf
    • http://files.shawnsaumell.com/uploads/1/3/2/7/132710621/0b4e79e14b6b.pdf
    • http://medux.cloudnetgocanada.com/uploads/1/3/1/4/131438137/6124712.pdf
    • http://files.amaneceryachtcharterscozumel.com/uploads/1/3/2/6/132683367/rizikozeriw-severabajim-kimoludosode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/74788431529.pdf
    • https://cdn.shopify.com/s/files/1/0452/2527/9648/files/paributowamar.pdf
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/63631847779.pdf
    • https://cdn.shopify.com/s/files/1/0445/3462/8516/files/98534338273.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/domirerut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/14636660658.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/71520155061.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3770/files/minecraft_magician_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/40855899534.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_off00008ff4.bin
14f2a3d006a1b21d2adc17aee35a08c3d95df30540acd14263ecadeba3952df4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 5172 bytes
font_01_sfnt_off0000a16f.bin
db8755930c5392223ca1762b0df367989bb8fd1ca42e4fb6a06b99e7f5826002
pdf-font-stream PDF embedded font (sfnt) at offset 0xA16F 15320 bytes