Malicious PDF — malware analysis report

Static analysis result for SHA-256 4757a00a1d8416c7…

MALICIOUS

PDF

35.9 KB Created: 2020-08-01 22:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91ea204585c52fa02427999a130df3ff SHA-1: 42985767bfab8d5a2970482a97c7d599a3cbf100 SHA-256: 4757a00a1d8416c791752825fa280ff9f3dcb43e07c65790352cabc9addd189c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/pify?keyword=da+form+638+apd, is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous links suggests a phishing or scam attempt to lure users to external sites.

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.ru/pify?keyword=da+form+638+apd
    • http://files.pagemusicale-lfs.com/uploads/1/3/0/8/130813782/gaxoreperekidor.pdf
    • http://files.bizoppempire.com/uploads/1/3/1/8/131872079/baratezoz.pdf
    • http://files.str8coastin.com/uploads/1/3/0/8/130813997/xotevawesume.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/93515518503.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/bagipebedij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/38895322975.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/53979544697.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/65557661926.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4157/files/pobefire.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/zagubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/70693274418.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/vewenovavalisivupezos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/22199756862.pdf
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/dotavuzozizurewu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/vojixuvemuxose.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/11623087592.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_off00004ed8.bin
b618dbb15cebf38d84cb17e6179312014462257d3224e277758311d322da88a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED8 5488 bytes
font_01_sfnt_off00006171.bin
6830521085d0bf20d141488f3a3df2554ff0ec9694ef941af6590383bd3b11eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6171 9784 bytes

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