Malicious PDF — malware analysis report

Static analysis result for SHA-256 be552caf02d122f5…

MALICIOUS

PDF

49.5 KB Created: 2020-07-26 13:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b99a40bc157d4f1577a820725359204 SHA-1: ced1ce38d9f88c355643dee8f372b46cde5e499d SHA-256: be552caf02d122f58f49e854a6c4224b01e796e9a45a164de1fda96027bcd7dc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute malicious content. One critical heuristic indicates a direct link to a known malicious redirector, 'ttraff.ru', with a keyword suggesting a lure related to Excel macros. The document body, though heavily obfuscated, contains text fragments related to Excel and macro errors, reinforcing the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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/pify?keyword=excel+spreadsheet+macros+not+working
    • http://files.bigbeenursery.com/uploads/1/3/1/4/131438038/piwalijoda_mojaxakake.pdf
    • http://files.edhamiltonstudios.com/uploads/1/3/2/8/132814906/kikevesura.pdf
    • http://files.striperhunt.com/uploads/1/3/1/4/131437532/2300942.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/zutivetagetulipojomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/22056937530.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7470/files/rejogexujusipojawovufidil.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/goxelaxusakuwujibajek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/76506704129.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7240/files/54266830763.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/7212522724.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/fofewunegime.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/84115137842.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/darob.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/95057222875.pdf
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/guval.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008388.bin
7046d39ce2ec3bd832704843d9565f0154496774af23b22fb4dfadd3b05b9cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8388 5456 bytes
font_01_sfnt_off00009600.bin
196bbdaed7573e662fe653c2e8b83df00017c5213329b65762627af6cfc02c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9600 10188 bytes

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