Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb8ccfd5fe5aaa9…

MALICIOUS

PDF

53.3 KB Created: 2020-08-05 07:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8f8f15142221e1d42f344e4eb99c65 SHA-1: 02646daa0eab58e50824d8762362b90ccde3e882 SHA-256: 7cb8ccfd5fe5aaa91fcc3f11b2065de75910c284fc1cb27c6a582941f03a3776
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=types+of+antihypertensive+drugs+pdf', reinforcing the malicious redirector finding. The presence of PDF-specific malicious link heuristics confirms the intent to redirect users to harmful 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/pify?keyword=types+of+antihypertensive+drugs+pdf
    • http://files.accessibleveganadventures.com/uploads/1/3/0/9/130969426/kakaw.pdf
    • http://files.nhmochamber.com/uploads/1/3/2/6/132683003/1872463.pdf
    • http://kagazi.thenaturalflame.com/uploads/1/3/1/3/131383791/87bfef78fd1.pdf
    • http://files.morinotes.com/uploads/1/3/1/4/131438329/wodarerogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/govelovizipagadisob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/mivarobubojimolaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/tefopuronilovugusevewog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/75108692208.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/xigojataxomerumu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/72200823497.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/55674808036.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/jemimunota.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/potebovixejoxugosinilad.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_off00009382.bin
ab7b6d8c8262c19a34f6ccc7aab39ae3f721b5e6e84c106d300c8c83c6e2ce24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9382 5384 bytes
font_01_sfnt_off0000a5de.bin
16347ce8801862dd562b525503abbdd2420612cabf2509503b71c65f2b4df1c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DE 10220 bytes

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