Malicious PDF — malware analysis report

Static analysis result for SHA-256 09360e379936d5ff…

MALICIOUS

PDF

46.0 KB Created: 2020-07-29 23:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41cbd89bd89ac8d4f2fb4df184188d0e SHA-1: fa211b11489e007bd5499d3286e3f9afec166641 SHA-256: 09360e379936d5ff0591b7128eebf49fddaef45b6cdd5ba0b1e38c07d197f2d7
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document also exhibits characteristics of a link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful sites.

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=functional+requirements+of+foundations+pdf
    • http://files.phsbusiness.com/uploads/1/3/1/6/131637081/ee25e0f60e3c7.pdf
    • http://files.vicjuniorxcski.com/uploads/1/3/1/8/131856232/kigoxukipoxupazitela.pdf
    • http://files.terryvillefairhorseshow.com/uploads/1/3/1/4/131453221/lififojozabep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/58072849337.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/zopabufepilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/68487192950.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/dapefafuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/wabutodibuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/38556417584.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/98006799231.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/vesulujufudedelowemid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/gikoxatoxuxisogijezize.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/tefajopazofolit.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/27687767557.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_off000076f4.bin
a5277b3e1bff433a6fcd31305ef5d5820933525f55406ebf10fba8f9cdac6e09
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 5264 bytes
font_01_sfnt_off000088b0.bin
0fefb38bdd13951532716e64eea25f8495aefcda7653e4042b3fede52579aa43
pdf-font-stream PDF embedded font (sfnt) at offset 0x88B0 9908 bytes