Malicious PDF — malware analysis report

Static analysis result for SHA-256 db670469cf035ac2…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 13:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1a38687a5e4c8a3760aa5fc29e850a SHA-1: 8b70c2ef4168cb04fd7740c2023a652c0716e19a SHA-256: db670469cf035ac2fb8f8aeb6c99eb857a65c61c76fb3c3affd9e343defb1017
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=despite+in+spite+of+pdf, which is likely used to redirect users to a malicious site. The presence of a large link farm, with many links pointing to cdn.shopify.com, suggests an attempt to leverage SEO or distribute content widely, potentially for phishing or malware delivery.

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=despite+in+spite+of+pdf
    • http://files.krgriffiths.org/uploads/1/3/0/8/130874129/96dffd9.pdf
    • http://files.maximiliangoetz.com/uploads/1/3/1/3/131380606/wogatotivokobe_bewukubi_bijejeb.pdf
    • http://files.babykomu.co.uk/uploads/1/3/0/7/130776268/e557897835f.pdf
    • http://files.thekissinglipsofamerica.com/uploads/1/3/0/7/130739678/wuputipinivop.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/terminal_network_commands_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/iap_vaccination_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/7431883214.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/anti_inflammatory_activity_of_medicinal_plants.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/zotopukolulunepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2363/files/stihl_bg55_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/70640867697.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/livro_zend_avesta.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/p90x3_classic_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/kazobewaxafanovuwofezobof.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/47175992009.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/51858906226.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_off000064ce.bin
437e38662c3e64926f5a949ed26f4ddef3edba7653761cee2bbf74f9c3b5ce72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 4696 bytes
font_01_sfnt_off000074e7.bin
985aec0eebd91215237c50e5dee9814113b4b987213f09b2b4ad45d30841e048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 10340 bytes

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