Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a3e14966eeb7cf…

MALICIOUS

PDF

45.3 KB Created: 2020-07-30 18:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 871890981730a9b020286582ccc8c268 SHA-1: 0b00575a264f98021de02723f8e39dccab2c6e1c SHA-256: 37a3e14966eeb7cf32cc1eb75909b6c33af0f438e3884d5d00ac1eb86468024d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious sites. The document body, though heavily obfuscated, contains text related to 'absorption costing pdf' and mentions 'wkhtmltopdf', indicating it was likely generated programmatically to appear as a document. The presence of a malicious redirector URL is the primary indicator of malicious intent.

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=disadvantages+of+absorption+costing+pdf
    • http://files.mesamindfulness.com/uploads/1/3/0/7/130775678/5319010849f56.pdf
    • http://files.glostermusic.com/uploads/1/3/0/7/130775916/167eb97d6cfe6.pdf
    • http://files.simonmorse.com/uploads/1/3/1/1/131163959/6487300.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/2319510953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/55447329038.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/94849108211.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/26359975031.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/wixovoleb.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/74927740126.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/wobavewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/26541749459.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/jonenolobowugusofudir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/galaruvigufofubinadavitir.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/reragum.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_off0000747a.bin
3cc872bf380b883bb30ec6851b38fa47aad6e11ab3740f209dd84103b927b390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747A 5280 bytes
font_01_sfnt_off00008679.bin
bc4cfac95568fe947a9e71d29673b89ae70969789fd82af623f35535c0987627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 9776 bytes

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