Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c68da1f1f1a7ff4…

MALICIOUS

PDF

45.5 KB Created: 2020-07-10 13:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96de4d91ee03de79fa11552d7200144b SHA-1: 4524b52bb78993ca89979d113dfd64f1df23c3be SHA-256: 5c68da1f1f1a7ff48a729c26db100edd128304b8aa2e816c297ecba69e5dd424
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to what appears to be a link farm designed for SEO manipulation. One of the primary links directs to a known malicious redirector infrastructure. The document's content is minimal and likely serves as a lure to encourage users to click these links, which could lead to further malicious content or malware downloads.

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/wb?keyword=naming%20amines%20practice%20pdf
    • http://files.ministryofthesentinels.org/uploads/1/3/1/4/131437531/4919626.pdf
    • http://files.jaewoodo.com/uploads/1/3/2/6/132695881/c9bd8984.pdf
    • http://files.winslowtabernacle.org/uploads/1/3/1/8/131856518/xifogafibewim-niwidabi-veguxefo-xamaful.pdf
    • http://files.cullmancommunitylions.com/uploads/1/3/1/4/131454238/7515596.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://files.stevenstackplaywright.com/uploads/1/3/1/3/131398000/betuxezotaxur.pdf
    • http://files.imarsonline.com/uploads/1/3/1/3/131380413/6c76ebc2.pdf
    • http://files.thecoloradoimaginarium.com/uploads/1/3/1/4/131453230/2909221.pdf
    • http://files.cutsriverside.com/uploads/1/3/1/3/131380754/jotijanudumokizibupa.pdf
    • http://files.westphaliarowhoa.com/uploads/1/3/1/1/131163564/kurododopetina.pdf
    • http://files.kstrainingacademy.com/uploads/1/3/2/7/132740870/wunikuzivoxi-lamebizi-warilemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://raxurutib.files.wordpress.com/2020/07/6990963680.pdf
    • https://daxetojip161513793.files.wordpress.com/2020/06/mawodure.pdf
    • https://laxokabe513272239.files.wordpress.com/2020/06/taserenigiraw.pdf
    • https://buroxuba862833009.files.wordpress.com/2020/06/77808000161.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3215656586.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000720e.bin
f77099ad0b3db76be1eeda1e7432adde43a275e7f38db0b6660a477cbca8ec80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 5092 bytes
font_01_sfnt_off00008340.bin
e454634121fc1499b85b696c517d4b43fb02d682ae967fd7e68735e2947c7f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 11040 bytes

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