Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc2008dc42cfbb8…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 07:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf59792cae6c2204c5b47b3427ca8606 SHA-1: 9c3cf7021c32ff2982bcb7d17f90f724cab87098 SHA-256: ecc2008dc42cfbb8e7c95e6fe1028ac0fd5c2166c0e637455d5260144eae9e9d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.ru/wix?keyword=thrawn+trilogy+comic+pdf`. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a lure to a malicious site. 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.ru/wix?keyword=thrawn+trilogy+comic+pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/navulurura.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/689346118.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/24978316715.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/93979422539.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/ms_sql_format_phone_number.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/bovetawitugitazigekamulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/30337545252.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/fifim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/14356488301.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/apery_constant.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/82786222916.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/treatment_of_breast_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/apics_dictionary_free_download.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_off00006386.bin
b4f362c64daf15a3844d7f3a71f28743d78cb35f67176f8e0d440470390d95ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 5536 bytes
font_01_sfnt_off00007640.bin
4f5e090b1030f1e6e044b5d3acc5afab4aeb66d68e0b32b80e07287108d85bb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7640 10444 bytes