Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5baf19b403cf1b…

MALICIOUS

PDF

49.7 KB Created: 2020-07-13 08:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c74dc2647aa879bc1221760f6816583d SHA-1: 2aa39bba8039faf8b5442802bf35ca573e605e65 SHA-256: 7e5baf19b403cf1b5512c3a2f85bb83e535500a6c0885e43b02241785a317852
154 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, indicative of a link farm or spam campaign. It also links to a known malicious redirector. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious websites, likely delivered via spearphishing.

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=la+tienda+de+los+deseos+malignos+epub
    • http://files.thorntonpubliclibrary.org/uploads/1/3/1/4/131437418/d75eef8c82a8d4a.pdf
    • http://files.readingisasuperpower.com/uploads/1/3/1/4/131454090/vekiboxiz_xuwefu.pdf
    • http://files.youngravensliteraryreview.org/uploads/1/3/1/4/131407214/zesaboxovenin.pdf
    • http://files.deeperwaterscounseling.org/uploads/1/3/1/1/131164211/jomakonizukobukafo.pdf
    • http://files.canecreekmbc.org/uploads/1/3/0/7/130740538/vedekutetiviz.pdf
    • http://files.mlovdc.org/uploads/1/3/1/3/131398000/lijelojigimakimef.pdf
    • http://files.sandyburlesoneportfoliowfu.com/uploads/1/3/1/4/131455680/1769261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zaneraji.files.wordpress.com/2020/07/18438167970.pdf
    • https://gilolarezuj.files.wordpress.com/2020/07/muloguxi.pdf
    • https://wupogoxaxiwu.files.wordpress.com/2020/06/ligome.pdf
    • https://vavokoze.files.wordpress.com/2020/06/ladaxoxo.pdf
    • https://xazitowede.files.wordpress.com/2020/07/fajisivixemorutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/79755077804.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/sitipudevizokixumonuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/54193963101.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/71692783029.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7c.bin
1c4c4fd411e0e4a55634e09508132aec42abf7c62583b5b00e93f55df30ca7ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 5144 bytes
font_01_sfnt_off00007ce1.bin
9f34cdff8cf21651b9fa3598d416e1bbaadd7a40d4fc4b210b37690246accbd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 11432 bytes
font_02_sfnt_off0000a209.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA209 16164 bytes

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