Malicious PDF — malware analysis report

Static analysis result for SHA-256 107d2d4827cf2e6b…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 08:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b016977ae5437abfc74814491e75ff8d SHA-1: 36c12d8a04014fc1d03a23307ce0a4a506d764ef SHA-256: 107d2d4827cf2e6bdf82128b76578bfbf074c4b72ed031ee620180ae5651cf1b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Ibps recruitment 2020 notification pdf', suggesting a lure to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=ibps+recruitment+2020+notification+pdf
    • http://files.brightleafscience.com/uploads/1/3/0/7/130738553/2125363.pdf
    • http://files.glenoakchurch.org/uploads/1/3/1/8/131856860/jemepatol_mulekemibibalin_vipeni_kajenav.pdf
    • http://files.lssbaseballacademy.com/uploads/1/3/1/3/131383604/nivuvewaxununa.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://vesipiz.southwesterngmtc.com/uploads/1/3/0/7/130776483/kexet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/56060452300.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/74497586097.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/48457742599.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/jeruziketasetipaguvororek.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/52456803976.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/lijigozanoseraduzupi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/50409513474.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/rofetenufuzodebafesavife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/lesofafivebokuzisosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/sigevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006342.bin
20f5401e15d869427fcd0cfcf421d681f6ac3a288eb09c68aed18b2e2dbba85d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 5504 bytes
font_01_sfnt_off000075d1.bin
f1f510228c150baa3adf46915a9fdd6718ff7228d249f053ced24aab25898dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D1 10004 bytes
font_02_sfnt_off000097d3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97D3 4324 bytes

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