Malicious PDF — malware analysis report

Static analysis result for SHA-256 05dc0ce236c3fd38…

MALICIOUS

PDF

41.2 KB Created: 2020-08-26 16:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7ef6bcb7cd45d7b65f62e76c3aeaa54 SHA-1: 7a9dd03548a7633ea8a8a9ffb185a7486e80bed2 SHA-256: 05dc0ce236c3fd38a079a36197cb466ccb958e67b9b19098b111272b0ee4f4b4
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 resources, including a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=daniel+olukoya+pdf+de+pontos+da+ora%25C3%25A7, which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious sites, likely as part of a phishing or scam campaign.

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=daniel+olukoya+pdf+de+pontos+da+ora%25C3%25A7
    • http://files.active-life-chiropractic.com/uploads/1/3/0/9/130969659/7314391.pdf
    • http://files.hydrogeosediment.org/uploads/1/3/0/7/130739826/401220d276.pdf
    • http://doposikul.givetotheworld.org/uploads/1/3/1/4/131453574/8777823.pdf
    • http://files.dameliart.com/uploads/1/3/1/0/131070792/lomoxor-lijapuzi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/65967325283.pdf
    • https://cdn.shopify.com/s/files/1/0458/1539/8566/files/letter_sounds_cut_and_paste_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/bhola_nath_status.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/difference_entre_cellule_vegetale_et_animale_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9108/2918/files/jawixodizumimarexofu.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/financial_accounting_jr_monga.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/78838828037.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/dog_knot_wife.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/turaforetesubiliw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.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_off00006145.bin
0c6f82a1b5943b0f6386b2c5409b0118bba528176444aac6fac6fb6c04e2d53f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 5384 bytes
font_01_sfnt_off000073ab.bin
1c9f9b9e02fb202335b9d46253e729e6a256d64bf5200b02c426238bd3f18b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x73AB 9940 bytes