Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedcd9c3c12c891e…

MALICIOUS

PDF

51.2 KB Created: 2020-08-29 19:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2bcbf040b71928f3699083497e0c6cd SHA-1: 73dac2d33de3788feba1405d70db9cb842ec7472 SHA-256: aedcd9c3c12c891e2eaaed4b3ee60a4e4cca600e28f508c03861eab89e10403e
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it contains a mass of external links, forming a link farm. One of these links, 'https://ttraff.com/wix?keyword=power+chords+chart', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious sites.

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/wix?keyword=power+chords+chart
    • https://static.usrfiles.com/ugd/b8c837_960112edbdbf4e43a1dc4431a4aea00f.pdf
    • https://static.usrfiles.com/ugd/b8c837_286d42d3721b4a818ad156a9620b876c.pdf
    • https://static.usrfiles.com/ugd/ac72e0_c65e27dd390a481aae197f51358f210d.pdf
    • https://static.usrfiles.com/ugd/097bd5_d9eab28923dc4a2da94e3a68639c7d2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_cac89a27fce747b0a6f67eab3ad22d83.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/rapojalewomokofinilope.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/73550764711.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/rikinavaxiwefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/zenewozisidimesifikenavi.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/topoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/zomodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/8297694647.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/18653924023.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_off000086f4.bin
80cff47c3414c802d23d22d8f16018daeafcc54cee5460d56197f4fe08f49499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 5088 bytes
font_01_sfnt_off00009843.bin
b2f888a06dc4a1beaf64a7bcaf801cdc83d7bc46702e949f24ae91853450c275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9843 12272 bytes

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