Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e91be32ad481ae…

MALICIOUS

PDF

40.5 KB Created: 2020-08-14 23:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96017f4a6e6c8aa98180d88697356783 SHA-1: 6250fe4c13bc1de994b05e479a2f315a0c9685c1 SHA-256: f3e91be32ad481ae8df4d111cfa19fd459239aa395952d539bdc08de658f6107
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates these links are part of a malicious redirector farm, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=airserver+full+for+mac', suggesting a lure for software downloads. The presence of numerous shopify.com and other file-hosting URLs indicates an attempt to host and distribute further payloads.

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.cc/pify?keyword=airserver+full+for+mac
    • http://files.myhelpdesk.store/uploads/1/3/2/6/132682076/01b61375315.pdf
    • http://files.christianherbivore.com/uploads/1/3/1/4/131438829/lanitibo-sizakufefezer-difoxusadeduse-munalu.pdf
    • http://files.gartonmillermedia.com/uploads/1/3/0/8/130813111/pifanifafija.pdf
    • http://files.black-hawkcompanynjrotc.com/uploads/1/3/2/7/132712661/wubijovisozem-ledosusor.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/ubuntu_remove_amazon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/41312191498.pdf
    • https://cdn.shopify.com/s/files/1/0449/8430/3775/files/72105464049.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/rijofobanuludijitoxutugus.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/xitipetujumujanonijib.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2507/files/46551099574.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/venom_carnage_comic.pdf
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/48017867116.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_off00006106.bin
4b5c224e46890061e36e244430cbaacd6dfb7eca0b3d14737cd6f3fabd056df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 5076 bytes
font_01_sfnt_off00007235.bin
6ca7337cf09d954ff9182602bb18fb32cb0c2f234794deb9fb68453cb78117f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7235 10420 bytes

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