Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b79982c56da916…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 10:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8d5cc51afdd38ddfbe40f6478b78989 SHA-1: 498060f35e5f1eab1628e5c7013741b5eae5b85f SHA-256: 84b79982c56da9165cf1cf65fede89b5a62240281920c08b89ff7d4532cd551e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=documentum+dfs+guide', suggesting a lure to a malicious site. The presence of numerous external PDF links indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads.

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=documentum+dfs+guide
    • http://files.kwtintl.com/uploads/1/3/1/3/131379899/xizipuviwagozuvu.pdf
    • http://files.heavenlyangelentertainment.net/uploads/1/3/2/7/132740270/8466287.pdf
    • https://cdn.shopify.com/s/files/1/0436/1689/5133/files/ronatubujevutexeto.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/ketogene_dit_rezepte.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/pedelofeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/vagazivugogavapalepote.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/green_day_holiday_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/bank_success_fast_preparation_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5974/8769/files/11486116150.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/61048697642.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/public_administration_and_disaster_management.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/jimelifuxafesisafewenape.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_off00005a50.bin
feefa62b4716e30544d522bbabe8eb57dd2e9a93ce3f0c03d8c3a142544675cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 5004 bytes
font_01_sfnt_off00006b4e.bin
a3a1cf5a1290189b10b730f8da0983a2ee33a76f466c40a33a8b70f4bbf95a11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4E 10164 bytes