Malicious PDF — malware analysis report

Static analysis result for SHA-256 17515c2162925fcf…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 20:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1710cde53c10a7f1bd73110d4a143bec SHA-1: 2b792d9d4db4372eb5caa2b8d6cf8f89bc4a8a6c SHA-256: 17515c2162925fcf4077c611d1804908738ad4837b6d2597ea174ef800d4a8da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.cc, which is known to host malicious content. The document body, though partially corrupted, contains the suspicious URL, suggesting an attempt to trick users into visiting it. The ML classifier also strongly indicated maliciousness.

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=shower+waterproofing+sheet+membrane
    • http://tegotux.utadao.org/uploads/1/3/2/6/132683001/3743944.pdf
    • http://files.lakemanorestates.com/uploads/1/3/2/7/132710575/8820505.pdf
    • http://judigexav.themakerexpo.com/uploads/1/3/1/6/131636612/7421549.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/67006664814.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/37870185014.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/60597662643.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/losevusemos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4575/5797/files/70810406923.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/44873009548.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/nutri_ninja_smoothie_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/taworiboxexapusesex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/free_printable_bulletin_board_letters.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_off000062c0.bin
b75f721621c53f2f822e0f7ffdd5ff2845f36cd7f093944ff1e02e2bda3b68e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5620 bytes
font_01_sfnt_off000075c3.bin
ca29baac81b1ef00fd1ce1b3df4573df33548a8e4b6e0baa7e1ff6dc253e7309
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 10668 bytes