Malicious PDF — malware analysis report

Static analysis result for SHA-256 598297fd155d3481…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 13:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0543d2f3b51e41dc9558613ad8544850 SHA-1: 5a8d30545b158c315762e9aba12715de518ac079 SHA-256: 598297fd155d3481fd023d35b5843c1362f5e9c86170b75c7150506cbfe0b205
150 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, many of which point to PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.link). This suggests a link farm designed to obscure malicious activity or to distribute malware through seemingly benign PDF documents. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=castillos+medievales+informacion
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/99340435380.pdf
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/velako.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/jeturuguzaporerofale.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/guitar_chords_chart_for_beginners_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/aha_guidelines_acute_pulmonary_embolism.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/2430111866.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/beholder_2_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/comparing_decimal_numbers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/6871/7216/files/anno_2205_moon_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/tibukiduxevixejokuzovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/sasuwumiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/9150/6840/files/zavet.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_off00006264.bin
57a4ffab1003adf381372674299a31b17e45ba09c87f0eda78983d09548ee003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6264 5132 bytes
font_01_sfnt_off000073c9.bin
89dc600c8ca19a298f2a79de867b7298cf253b44eaf79d5256de464340ef9e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C9 10308 bytes

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