Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f567ea13e9d009…

MALICIOUS

PDF

39.7 KB Created: 2020-08-17 17:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29fe7c268fcd3dc991ca0b23c4a7b5a5 SHA-1: 407c676c7ad31e9fcf928887acb7ac2b75da619f SHA-256: 07f567ea13e9d009be972a41f29d3b4c82924992d360fc0ea19af64d1e46beaa
154 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring the user to the malicious URL via a seemingly benign document.

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=blank+greeting+card+template+free++word
    • http://files.blossomvalleysingers.org/uploads/1/3/2/7/132710704/xesebupajofexamewur.pdf
    • http://genofi.cceaga.org/uploads/1/3/2/7/132740435/b354cbaa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/35586374739.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/22000804435.pdf
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/84519592740.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/kikowabaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/calcitonina_como_marcador_tumoral.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/mozamizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/18104074114.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/83295521300.pdf
    • https://cdn.shopify.com/s/files/1/0437/0586/0248/files/pazalogenigutebasef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/53230154371.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/22389167796.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_off00005d7b.bin
6777ee5fafb785229790c4ce17b9a8f26c0a35bcb9cc3bff4ff86d53cb2fbcd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7B 5500 bytes
font_01_sfnt_off0000702e.bin
4b82b9f0e1517dfbf00c0b4d686f67b87f96f350f504d754d427619f86b6fcbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x702E 9920 bytes