Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8ea9d31db7c734…

MALICIOUS

PDF

38.0 KB Created: 2020-08-16 20:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29bba59cc2874cd5279ec3279498da6b SHA-1: cc27547a765fcb899bdc8542adcef3a302fc4aa8 SHA-256: 5e8ea9d31db7c734bf28e24f6b7a977dce8c43c503c99a5a394840079b1adec3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=saint+saens+clarinet+sonata+op+167+pdf, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a malicious intent.

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/pify?keyword=saint+saens+clarinet+sonata+op+167+pdf
    • http://files.thepaulbr.org/uploads/1/3/1/0/131069899/9137589.pdf
    • http://xovatumif.christianlifeupc.com/uploads/1/3/1/4/131453990/8ac4dd26.pdf
    • http://files.breadivore.com/uploads/1/3/1/3/131380612/mijeburil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/fifivejeruporuziruporugap.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/antioxidant_activity_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/85115938758.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/pdf_split_and_merge_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/xibuvulivedonisupiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/laporan_titrasi_kompleksometri.pdf
    • https://cdn.shopify.com/s/files/1/0452/7328/4769/files/culture_of_animal_cells_freshney.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3253/files/rpn_calculator_ruby.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048dc.bin
9618fbd0fc166e2e1f98b030140edb8fdd210a0108afc66613dc74eee22120c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x48DC 5324 bytes
font_01_sfnt_off00005afa.bin
b26785c5d5aa2a6df8b65ad0180e24dddabbd697472fec5c63ac32b5580a2449
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFA 9948 bytes
font_02_sfnt_off00007cfb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFB 4324 bytes