Malicious PDF — malware analysis report

Static analysis result for SHA-256 011d0c5965f229f9…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 01:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69de381bdd109a293819df95f89816c SHA-1: 15c598ddaec17f6a6835dff0ac9480f87c4cc022 SHA-256: 011d0c5965f229f944ba64b2750c920f683613c235895adccaa3d2efe8a9ff37
154 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=cirrose+em+caes+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. This suggests a campaign focused on SEO manipulation or redirecting users to potentially malicious content. No scripts were extracted from this sample.

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=cirrose+em+caes+pdf
    • http://gatawe.live-life-organized.com/uploads/1/3/1/0/131070702/8804981.pdf
    • http://files.filipinocursillosf.org/uploads/1/3/1/4/131453823/ae238b18ae.pdf
    • http://files.septembershowcasesale.com/uploads/1/3/1/4/131406372/vudixivaw.pdf
    • http://files.kofc5962.org/uploads/1/3/1/4/131438018/5666027.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/30595928023.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31443612403.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/90387793059.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/estrutura_de_um_site_em_html_tags.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/african_continent_countries_and_capitals.pdf
    • https://cdn.shopify.com/s/files/1/0454/8503/1576/files/java_web_services_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/pinazarijibenisol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/6139646662.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/38057747206.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c08.bin
b9765d022434d08722fabf0af36649a2fe6af682664cd6aedda057d3b4410b66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 5172 bytes
font_01_sfnt_off00006d80.bin
3d43a6087bc1e1cdcc5acc18f4b613c1351fb072b5ac51fa9c8c2e950a2b91d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 9996 bytes