Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf1fe64a8f6d502…

MALICIOUS

PDF

56.0 KB Created: 2020-08-07 00:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b4fdad1b31400c0ef730de385d9f30 SHA-1: ab59581a6b66db5bc88ba2036261fc32848011d4 SHA-256: abf1fe64a8f6d502f5b495e4f8d4a7791a7f16de57c96e690fc518d9e572b76d
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high number of embedded links, many of which lead to a redirector service. The document body contains text related to '100 palabras mas usadas en ingles pdf' and the wkhtmltopdf application, suggesting a lure for users searching for language learning materials. The primary malicious IOC is the redirector URL, which likely leads to further 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.com/pify?keyword=100+palabras+mas+usadas+en+ingles+pdf
    • http://files.totnessvintage.com/uploads/1/3/0/7/130776054/825182.pdf
    • http://files.psychictara.com/uploads/1/3/1/3/131384070/julupoxuxis.pdf
    • http://files.rempahdapur.shop/uploads/1/3/1/4/131438449/7438727.pdf
    • http://files.chupacandelabra.com/uploads/1/3/2/6/132681976/6957027.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/bixinukukurapinimemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/43667435371.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/88545532950.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87913440599.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/krishna_yajur_veda_brahmana_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/50129239890.pdf
    • https://cdn.shopify.com/s/files/1/0433/9911/9013/files/75070806767.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/99004557599.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/65678376316.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/pidejamer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/properties_of_skew_symmetric_matrix.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_off000098c6.bin
a485abe0d2df8f6bdf89cb29edf269898dc2ceed292cb92432e0038de83bedc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C6 5600 bytes
font_01_sfnt_off0000abb0.bin
7a7ee86f5f69bb23397d6db9902f6b950c022a18000aa2dd7501ec0cec14f3fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB0 11532 bytes

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