Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff5577e5b0c304d…

MALICIOUS

PDF

38.2 KB Created: 2020-08-22 22:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a443b57838d015aefff80348936ed9ab SHA-1: 282140b6f1a8c834964ffbbb68ab2b36768643f0 SHA-256: fff5577e5b0c304de10d0022ce802d8680ed8dbfdba654286df18a95ba54b9ce
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though partially corrupted, contains the URL that triggers the malicious redirector. The primary intent appears to be directing users to malicious infrastructure, likely for phishing or malware delivery.

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.com/pify?keyword=positive+comparative+superlative+adjectives+worksheets
    • http://dexejunub.magicalcelebrationsutah.com/uploads/1/3/0/7/130739615/xusonodijeniwisedag.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/41868571059.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/altitude_app_for_android_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/autocad_civil_3d_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2275/9582/files/pipatas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/franklin_covey_planner.pdf
    • https://cdn.shopify.com/s/files/1/0430/6832/6042/files/zonebogiwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/1738838674.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/puwufatisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/mukizabakedumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/xajezipuroritefiluf.pdf
    • https://cdn.shopify.com/s/files/1/0444/2423/3126/files/brahmin_settlements_in_kerala.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/vozalaxirewifojupumer.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_off00005693.bin
157b4d98357c934f4895fc343b7536755eef3e9ee0ac34962ad757c8a483fecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5693 5604 bytes
font_01_sfnt_off0000698e.bin
00db03a1489000efdcf8b0f26cbf06805d3aa6d73a59a804510268acccd4d896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698E 10060 bytes

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