Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34997451f480c23…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 16:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 121aea03908eb27e1b82ee7b9811425e SHA-1: 8ee72c1dcfa9ccd194f068e3103fcb61447c1c84 SHA-256: b34997451f480c23720a7c955f3446e4de4bfe0933565994d18cb10241a1fd51
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to embedded links pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=auto+sync+folder+to+google+drive+android', which is also listed as a malicious redirector. This suggests the document's primary purpose is to lure users to a malicious site.

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/wix?keyword=auto+sync+folder+to+google+drive+android
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/cistellaria_plauto.pdf
    • https://cdn.shopify.com/s/files/1/0453/5540/1371/files/49458896455.pdf
    • https://cdn.shopify.com/s/files/1/0459/9906/3199/files/after_effect_template_free_intro.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/turojaduxuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/mysql_default_root_password_mac.pdf
    • https://static.usrfiles.com/ugd/ae15ca_34c1f9a40c634d9399a088d39cb476e1.pdf
    • https://static.usrfiles.com/ugd/538d67_816fec90b757448ea97195c072f91f30.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/22062649752.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/62701487442.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/75515975964.pdf
    • https://static.usrfiles.com/ugd/b8c837_d338ef3bfea54650b258c3a3c51d4b70.pdf
    • https://static.usrfiles.com/ugd/afe78f_d81e91e9935b4e6b8eaf615d484c66b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddbbd5f0e68a4e4d8a973a8d228d58dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_11a53feb3f1d4891977363a9b9ba0a44.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_off0000737a.bin
992ded89cbde9a9e6c74c6c4b42536f8c914542a8babf24c086b4485f16a78c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x737A 5340 bytes
font_01_sfnt_off000085c2.bin
8f045ebf5782ba8c5f9a95876f5b883333a3f98eaf9f6e8ea704f886b99f1fe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C2 10468 bytes