Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f488ef0f4ed2044…

MALICIOUS

PDF

103.8 KB Created: 2020-08-05 03:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd4e9028fe1e3a27fac58712373441d SHA-1: 0b6f0f4663a8e3f852f2581d40b56f83ac89783a SHA-256: 0f488ef0f4ed20441a538c009d29fa80fcb7d992ce2539f6c49f29923f636b7e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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=ais+expenditure+cycle+pdf
    • http://files.authormariebenedict.com/uploads/1/3/2/6/132696483/pafoz.pdf
    • http://files.getelevatedny.com/uploads/1/3/2/3/132303359/d7d3d3.pdf
    • http://files.washngoalabama.com/uploads/1/3/0/8/130873872/mupajemobaneli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/fanaredo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/dabamurafume.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/woduno.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/totato.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/22361495390.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/lukozitedadoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/zirekek.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/70718731194.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/rikasemuvekitizevovawug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/26256347710.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/fiche_revision_brevet_2020_francais.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_off00014caa.bin
1a78c700ac3dd66a7d8ecf4fb77c49dca1064997f9ebe322092b57c6b80360c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAA 5096 bytes
font_01_sfnt_off00015e21.bin
95692175e4ae4710ae89b6ef824f105d62f92e4406e96a7b9540452c98d134f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E21 17168 bytes