Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f106d8dd8172b0…

MALICIOUS

PDF

109.7 KB Created: 2020-08-26 21:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e14d5c1725f454eb3c083eca637b2b SHA-1: 417b55ebd7914c6891abc007259e1b772c9872a1 SHA-256: 15f106d8dd8172b0902597438b6e65c938c0cdedbb9dd5e17e0aa5ab2b5c1afc
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.ru/pify?keyword=biologia+celular+y+molecular+gerald+karp+pdf
    • http://kisamow.trebellasdance.com/uploads/1/3/2/7/132712315/62fa37b02f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0465/9501/4821/files/lab_equipment_names_and_functions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/area_of_shapes_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/lisegere.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/white_christmas_jazz_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/xenufebet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/thunder_force_vi_iso.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/chapter_24_milady.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1909/files/78929603443.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/rixowimonurini.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/51611818615.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/11528280196.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_off00016a22.bin
408dc534030392bdc78d5d01e8d48d4b67409818ec7ba798ac0aab2845b40a5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A22 5512 bytes
font_01_sfnt_off00017cd0.bin
5902c8ecd4f41ce747f9e99eb52bdfbcab9f4c969df8ceb262d87bb4b49bb751
pdf-font-stream PDF embedded font (sfnt) at offset 0x17CD0 14472 bytes