Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e54882604502c3…

MALICIOUS

PDF

58.7 KB Created: 2020-08-02 17:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6072545e346fe2624767ac06b07cbea SHA-1: bf6a660d717453f7a134ac0d85d3ef98a609f54d SHA-256: 16e54882604502c384543aad097a1160091409d44d6bce62cbf141161a5e38a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service. The document body mentions 'Baby girl skins for minecraft pe', likely a lure to attract users to click on the malicious links. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful content.

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=baby+girl+skins+for+minecraft+pe
    • http://files.paulcotecaller.com/uploads/1/3/1/3/131384436/nemerot_bebagosizuwopo_divurivedi_liwinibitowes.pdf
    • http://files.roseorchardsfarm.com/uploads/1/3/0/9/130969984/9563515.pdf
    • http://files.alliedcontractorsgroup.com/uploads/1/3/1/4/131453725/difikiwidare_donabe_jegodosu.pdf
    • http://files.sethcarper.com/uploads/1/3/2/6/132695782/3648724.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1809/0653/files/26172363965.pdf
    • https://cdn.shopify.com/s/files/1/0448/4068/1633/files/neverwinter_nights_console_commands.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/xirafidijaxata.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/74400053394.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/paxukobikalovefufokutep.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/43045369326.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/sevivajonobogaxemotuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/41736735071.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/tasivakubupiwilelokamez.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/6551998896.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/juvolawujovukojuzewe.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_off0000a5ac.bin
69e70cfe2d319e112747f396b47cf3e03b25ea60e0a1ea69f941bf220b04c1b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AC 5692 bytes
font_01_sfnt_off0000b90e.bin
0e3684d76262ff77e1e3422ac586588fb8a4e6f2b9e08f3924f7d15b4b64f99b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB90E 10668 bytes