Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d36ed9cdbad7d1c…

MALICIOUS

PDF

43.7 KB Created: 2020-09-02 04:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f77aa263437a3c9289471b2bc03beb4 SHA-1: ffb680de35fac7d7bb355c3ad83e7b177457f06e SHA-256: 4d36ed9cdbad7d1c949dc29ae3a6f5e568d31228109316c8a076fcf2174aa379
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club', which is used in conjunction with a link farm strategy. The document body, though heavily obfuscated, contains the same malicious URL and references 'Microsoft office 2016 64 bit iso', suggesting a lure for software downloads. The presence of numerous other PDF links, many hosted on 'cdn.shopify.com', further supports the link farm heuristic.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=microsoft+office+2016+64+bit+iso
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/catia_assembly_design_projects.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/10474772777.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/japan_travel_guide_january.pdf
    • https://cdn.shopify.com/s/files/1/0440/5261/1222/files/asynchronous_state_machine.pdf
    • https://cdn.shopify.com/s/files/1/0462/4842/7671/files/bangalore_master_plan_2031.pdf
    • https://static.usrfiles.com/ugd/122077_84cc1e4a32144e2aa52bb1fab85a8ccd.pdf
    • https://static.usrfiles.com/ugd/314c35_c7f1fe1b07aa46dc9ff88ec5637e78d8.pdf
    • https://static.usrfiles.com/ugd/eed56f_47c1a7f93bfd498b8b0f9c71fd89e3b8.pdf
    • https://static.usrfiles.com/ugd/cafc24_24a165cb2d69479eaf53793d6f875a72.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/47885380453.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/14266593970.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/aprender_ruso_basico.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/sufawadidomub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/tajifotemolam.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_off00006c4f.bin
35ef9c91d4e2ef4c5d54788ba7ea9e64a91822a94833a6b69e559d5bb3041c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 5348 bytes
font_01_sfnt_off00007ea8.bin
cbe922009a28f14b93e0e8cccfb82c13e140e5c2b4e7855e904033316238a16d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA8 10392 bytes

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