Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92704721eca6e1e…

MALICIOUS

PDF

58.8 KB Created: 2020-08-06 16:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f84cdc21a138e75edf4bad5c535cf7b SHA-1: 2b995bef2620e85277e0b7c34c6e946c369e9b5f SHA-256: d92704721eca6e1e25704481b4701b7a6a31f47a21a3215afcd6550e4396f5ab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting the primary goal is to redirect users to potentially harmful sites.

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=byzantine+church+architecture+pdf
    • http://files.traveltherapyco.com/uploads/1/3/1/4/131453109/nupetatapa_gavokufofis_padowibe_fakitelidenitig.pdf
    • http://files.mattiacupelli.com/uploads/1/3/2/6/132695730/bojuwopolumid.pdf
    • http://files.techtrekfriend.com/uploads/1/3/2/6/132695568/nivexuwebasigu.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/paradise_lost_summary_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/69854883805.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/50497141781.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/wigopodowofunana.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/swagger_mega_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/lolidiwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/fuzalaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9586/files/89925121453.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/93478279020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/85224989502.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jiwodekipetedefaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9561/files/27387963259.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/49090208052.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a54b.bin
2de7f8266f3629d8aed8f4ddd7cf7617f5020eee6fdb3c42251c9afbae8158a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA54B 5232 bytes
font_01_sfnt_off0000b728.bin
a05a726760f771c2f8e1abdb1599b68c44c46a7eb568b5c3320c79bdfccd27ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xB728 11844 bytes