Malicious PDF — malware analysis report

Static analysis result for SHA-256 743b48aa6a56225b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-02 12:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7135b212fe559ca6b42b0b150a5067dc SHA-1: 794be47860b865483eb7c4a9d72bf6cecec6879c SHA-256: 743b48aa6a56225b86de4099bc305798b5305c89649cbd200f30f8f51b8a7480
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary link pointing to a known malicious redirector infrastructure. The document body, though obfuscated, contains text related to 'software serial keys' and the authoring application suggests it was generated programmatically. The presence of many external links, including those to Shopify, indicates a link farm designed to attract traffic, likely for malicious purposes.

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=software+serial+keys
    • http://files.lowvisionnd.com/uploads/1/3/2/7/132741089/2268120.pdf
    • http://files.ledger5properties.com/uploads/1/3/1/8/131871501/6777032.pdf
    • http://files.younglifeeastmanatee.org/uploads/1/3/0/8/130874490/fa7b36cfa6c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/vototuxukut.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/kawen.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/binawanoxolaluvili.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/7607410206.pdf
    • https://cdn.shopify.com/s/files/1/0432/1309/5067/files/15743264858.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/king_lil_g_mixtape.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/96146398952.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/13784958007.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/zaziwovadagejonekipep.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/11965825459.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_off00006a98.bin
4c87c05df32476ca16ddc9f2b94be39f433cf7c03c24b7b1d4d9bf0316af98bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A98 4804 bytes
font_01_sfnt_off00007b0c.bin
9c8a82db82466d9c9e1da129cbc6443833568cd84f3a23b74bd97f501ad60409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0C 9900 bytes
font_02_sfnt_off00009ce4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE4 4324 bytes

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