Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca065b0b913e4a7…

MALICIOUS

PDF

59.0 KB Created: 2020-08-19 06:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 200872e2cf07822f9f8307a9b27bfdc2 SHA-1: aa66704c741cde745c0b19381dbb74304a45207c SHA-256: cca065b0b913e4a770f83836f72fda25544c37c5c8a058262cdc640e7cdca52c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, identified as a link farm, pointing to a redirector URL. The primary malicious URL is https://ttraff.com/pify?keyword=bloodshot+ramparts+challenges+guide, which is flagged as malicious. The document body, though heavily obfuscated, contains this malicious URL, suggesting a lure to external content. The ML classifier strongly indicates 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.com/pify?keyword=bloodshot+ramparts+challenges+guide
    • http://files.guidingsuccess.org/uploads/1/3/0/7/130775402/kekusepemudanomavob.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/menus_de_restaurantes_mexicanos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9631/files/list_of_adjectives_to_describe_personality.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/980195019.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/besifijasoxidis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/84876589494.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/wexunufuvim.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/lurima.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/jefowafenobilenugirupuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/anterior_tibial_tendonitis_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/banded_iron_formation_important.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/4409767621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nozawilod.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_off0000a7ea.bin
80a42012cda44cf0dfa30d1a9e3f25ac79d5e33e5169e712cef247f325f108c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7EA 5536 bytes
font_01_sfnt_off0000ba9a.bin
f23f447c41923a9b766d87336e37c956755457c34986f0076f8912b35012c60d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9A 10608 bytes