Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dfb740736d90a2…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 06:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa55697c20455d7a0b889cc119d0d936 SHA-1: 437bd11a30e51985f9081cc011963499d37cb152 SHA-256: 82dfb740736d90a2ad12af2019bd14ebcb0122d17e59fc32f7c6a3c050d66c29
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily garbled, contains text related to reporting illegal dumping and the URL itself. This suggests a social engineering lure to trick users into visiting a malicious site. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or distribution mechanism. No scripts were extracted from this sample.

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=report+illegal+dumping+hazardous+waste
    • http://bonubo.keithalman.com/uploads/1/3/0/7/130739561/lapusosusew.pdf
    • http://wejasamer.nationalriskmanagementgroup.com/uploads/1/3/2/8/132814930/52b7849dd35.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/71003538433.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/90070205808.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/english_to_arabic_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/cumulative_sum_control_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/53701350554.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/67597014336.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4339/files/calculus_made_easy_silvanus_thompson.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/38941109283.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/15616406297.pdf
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/91549126378.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_off00006ac0.bin
4d90aff167f2d468c4bc401501a87e43529322b994100db3efd083cb3444b94c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 5520 bytes
font_01_sfnt_off00007d72.bin
1a3e7b3efe299222331735ff68c149348e95550cc7ec40e265b2804f23054fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D72 10412 bytes

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