Malicious PDF — malware analysis report

Static analysis result for SHA-256 49874a461d21f0e3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 03:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0ccc72942321e53838703856e487429 SHA-1: 59f75094dcb69fb14e146be8184e4313a6162a57 SHA-256: 49874a461d21f0e3a418e32a11f0cab7b75fb8c3e84f7a84babd720a50c17b44
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The primary malicious URL, https://ttraff.ru/wb?keyword=tableros%20de%20control%20libro%20pdf, is likely used to funnel victims to further malicious content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates to malicious destinations.

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.ru/wb?keyword=tableros%20de%20control%20libro%20pdf
    • http://files.magothycooperative.com/uploads/1/3/0/7/130776757/defe9e489d.pdf
    • http://files.artbyguyyoung.com/uploads/1/3/0/7/130775195/9569679.pdf
    • http://files.jolietwestlibrary.com/uploads/1/3/2/3/132302894/b4f3c6401.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4096/files/anglo_saxon_period_in_english_literature.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/sawigizikezetovur.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/fuwodevavusepababovo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/jezewerebotejifenal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/23544142426.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6999/files/pajamifefuzewuzazedoredid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/voronise.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4696/files/cardiology_textbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/gudevibepeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/96162402059.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/89803154579.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_off000061c8.bin
72101c6051a3d8fe1a05380e716bee9ab08df71e334eec8ad01b4736322c94d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5236 bytes
font_01_sfnt_off0000739e.bin
70d5bba586734d738421ee039918973e28ed5df32b86348328090b7b303415eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739E 10740 bytes

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