Malicious PDF — malware analysis report

Static analysis result for SHA-256 a942e1f6e1f87d27…

MALICIOUS

PDF

44.9 KB Created: 2020-07-25 12:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e8ff2b544811c42e4f758411a355487 SHA-1: 6e177363039104d203947e3f6ed565d07f2e1948 SHA-256: a942e1f6e1f87d273c837f2435dcac79097db1dd7d70addcae971856b6c030db
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links, including one to a redirector, strongly suggests a malicious intent, likely for SEO manipulation or to lead users to phishing or malware sites. The file was generated by wkhtmltopdf, which can sometimes be abused for malicious purposes.

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/wb?keyword=gourmia%206%20qt%20digital%20air%20fryer%20manual
    • http://files.argonautcoffeeleavenworth.com/uploads/1/3/1/1/131163740/f1cf8426eba5bbf.pdf
    • http://files.picsandwics.com/uploads/1/3/1/8/131856071/zexeselalopopipizij.pdf
    • http://files.nursing343.com/uploads/1/3/1/4/131453387/160351.pdf
    • http://files.estherbruer.com/uploads/1/3/0/8/130814534/992839.pdf
    • http://files.welcometo6h.com/uploads/1/3/1/4/131452953/luximamugubinepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/69640866405.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/79776440838.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/jiwavabivos.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/41429150278.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/jisepimokapupofazonut.pdf
    • https://cdn.shopify.com/s/files/1/0432/1676/5087/files/lusebavotebetozorij.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/68526584929.pdf
    • https://cdn.shopify.com/s/files/1/0432/1191/5421/files/69634262330.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/dizuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/dekekorakotodaraf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/98465006143.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/
    • https://cdn.shopify.com/s/files/1/0433/068

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070af.bin
c670ea349d774e71e7b8b9947d71547e1dfae6faf96bd823307b5170848852d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 5344 bytes
font_01_sfnt_off000082ca.bin
14c477eee663f921c56eb0fa79a3a6f8573b3b050ad818deaa34bdf64be0dd17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CA 10236 bytes

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