Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47738b3f626e4c8…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 04:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 944a67ce442b5458b48436ea933c5ea1 SHA-1: 2a3701858c8a64786a6cbf6780c77d66bb26b46e SHA-256: a47738b3f626e4c8e180a8a9debb7b0ae412ffe8adbfbcfe94f3c1920ad85935
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 PDF files hosted on various domains. One of the primary links, 'https://ttraff.cc/pify?keyword=consumer+reports+best+home+air+purifiers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a malicious site. The presence of numerous links, including those hosted on cdn.shopify.com and other domains, indicates a link farm strategy to distribute malicious content.

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=consumer+reports+best+home+air+purifiers
    • http://rojojumo.pushtichetna.com/uploads/1/3/1/3/131380600/c14e34be3558e7.pdf
    • http://walazer.collegequo.com/uploads/1/3/1/6/131606289/sinibuj.pdf
    • http://files.trducks.com/uploads/1/3/2/6/132695714/wokumubagezanajin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/92512112872.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/chaim_potok_zebra.pdf
    • https://cdn.shopify.com/s/files/1/0432/2305/6545/files/ahwahnee_principles.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/13842824921.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/aprender_kanjis_japoneses.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/80748015331.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/42243573377.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/missing_411_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/javulipekotedalil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/54756255407.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_off000066bf.bin
118ebca667a20f3f096da7a07a1b8e14fd4567c461ae0d014cbc92abab9a2b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BF 5152 bytes
font_01_sfnt_off0000780a.bin
bb0691c20c10ca04a4994adc2a9c58c6846aed2e9de6e17e7dea8e74b77dfda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 10364 bytes

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