Malicious PDF — malware analysis report

Static analysis result for SHA-256 056221e69e27a018…

MALICIOUS

PDF

52.5 KB Created: 2020-08-17 05:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4b0b1648af2416b7266e630fddcb956 SHA-1: 47ef71b5ef5277a0e01c6d1f0261fb71d8f29cf2 SHA-256: 056221e69e27a0187f55cfccbb0d8121c6834e3ef3b3feb68accc1b91cb5de3b
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 of which point to PDF files hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=bipasha+basu+yoga+free, is identified as a known malicious redirector. The presence of this redirector suggests an attempt to lure the user to malicious infrastructure, likely for further exploitation or phishing. The document body itself is heavily obfuscated and contains the malicious URL, indicating it is part of the lure.

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.ru/pify?keyword=bipasha+basu+yoga+free
    • http://wawel.kellyannecostello.com/uploads/1/3/1/1/131164250/b29fb3126841a.pdf
    • http://files.paulinedodd.com/uploads/1/3/1/8/131871705/teleduwaseruluxalafo.pdf
    • http://files.runcietatnall.com/uploads/1/3/1/4/131454355/lurodonebakuxugage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/amniotic_band_syndrome_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/warhammer_bestiariusz_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/wuripeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/chapter_zero_fundamental_notions_of_abstract_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/59353705626.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/mafomipukawazojar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/ielts_bar_chart_sample.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6760/files/51897717752.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/99_names_of_allah_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.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_off0000708c.bin
7cdbe8551fa4b986dc480e2d3fbf4e52e60b2354030a3bd578e1202d07353485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 5420 bytes
font_01_sfnt_off000082fc.bin
e7de17a5c918a5af8d1a457f021117136f62ba4f9b70980e7715378c1761e091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FC 10468 bytes
font_02_sfnt_off0000a71f.bin
e332b2de25fc9290b7c5098862bf9b30c28e180ae5f507d55364e1f4f044e06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71F 9208 bytes

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