Malicious PDF — malware analysis report

Static analysis result for SHA-256 578a9fa7ee94db60…

MALICIOUS

PDF

52.3 KB Created: 2020-08-07 13:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a538b92b59889f453064dfaffa98e5e5 SHA-1: c31138cc16ed0bc395a1efc6cd6fc42f325c6792 SHA-256: 578a9fa7ee94db605bcf8bbd1470eeb5ac9bb35e8833166f61f1b322ef01a30d
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=blackbird+beatles+tab+pdf. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended lure. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=blackbird+beatles+tab+pdf
    • http://files.holistictherapiesllc.com/uploads/1/3/2/7/132712072/392067.pdf
    • http://files.uncommongroundsmobilecafe.com/uploads/1/3/0/7/130776183/2875893.pdf
    • http://bagoz.socially-m.co.uk/uploads/1/3/1/4/131437601/4198670.pdf
    • http://files.ourbendfarm.com/uploads/1/3/0/7/130738924/kujixuguwosizuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/mnemonic_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/sijosib.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/suzexotega.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/apprendre_le_franais_en.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lamafavikunidamekisuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8543/7853/files/kawimika.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/82472227918.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/sql_between_inclusive.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/business_model_you_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/hex_color_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/puvuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/child_development_stages_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/6475/4325/files/4487305220.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a79.bin
27c0e1725cdc7ad716e73d8193035362a7e8477a42c9b83abb809624ac3b196e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 5404 bytes
font_01_sfnt_off00007ce1.bin
582f93bc81b07206a740b2376c18da8c334119612b23c5472f5cfc1641d5205a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 15440 bytes
font_02_sfnt_off0000ad29.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD29 16204 bytes