Malicious PDF — malware analysis report

Static analysis result for SHA-256 015fab7bf67a612e…

MALICIOUS

PDF

37.3 KB Created: 2020-08-11 22:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3d354306999d7be9272902a07f50665 SHA-1: 26b4d29684874aeb1f0b29848b168c7a755618d7 SHA-256: 015fab7bf67a612e3cfb572b1ec5d6d1a3edafa3589a86cb607a427964fe2bf4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=calendrier+2020+semaine+pdf`. This indicates a likely attempt to redirect the user to a malicious site, possibly for phishing or malware distribution. The document body itself is heavily obfuscated but contains references to the redirector URL and other PDF files hosted on various domains.

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=calendrier+2020+semaine+pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • http://tibebegos.geriatricpsychiatryresearch.org/uploads/1/3/2/6/132681556/mazer.pdf
    • http://loxakuvu.rogger.net/uploads/1/3/1/6/131606490/e416420c3061a2f.pdf
    • http://files.villasundream.com/uploads/1/3/1/6/131636903/6660804.pdf
    • http://files.sfwarevents.org/uploads/1/3/2/6/132681946/fitipavebunu-rotusuzedo-vugug-puliropokit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/nomon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/25308404446.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/sixid.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/96503302273.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/44846156025.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/dufuxubadafigiribemija.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/34626693246.pdf
    • https://cdn.shopify.com/s/files/1/0438/7959/6187/files/periodic_table_of_elements_with_atomic_mass_and_valency.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_off00005100.bin
29d86c64fa026427e7bb1c75e0f97479b73c5e4ea0409a4381126068461bdf07
pdf-font-stream PDF embedded font (sfnt) at offset 0x5100 5364 bytes
font_01_sfnt_off00006322.bin
4d642bb85e9455e2ed21909f1f52644b92d6d4a669b96e8d99c8d9aae5700683
pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 11372 bytes