Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ea23ba6e3661f2…

MALICIOUS

PDF

39.9 KB Created: 2020-08-06 22:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27ab9f497da688f7a4fd0aaa1b6f120 SHA-1: 9ed9007475e8a431b36afc741d8b2074b9ec3bf0 SHA-256: 01ea23ba6e3661f2f0cc5a8c0b32b0a1368656b6b323762153d2088aac050566
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=technical+sales+manager+job+description+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to job descriptions and includes this malicious URL. The presence of numerous external PDF links, many pointing to Shopify domains, suggests an attempt to create a link farm or distribute further malicious content, with the primary redirector being the most critical IOC.

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.com/pify?keyword=technical+sales+manager+job+description+pdf
    • http://files.neisdoap.com/uploads/1/3/2/3/132303378/4333660.pdf
    • http://nitev.mc-authority.com/uploads/1/3/1/8/131871478/6594333.pdf
    • http://files.kansascoringandcutting.com/uploads/1/3/1/3/131378952/6815400.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/55319377085.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/articles_rules_in_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/guvisokitonugufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8992/8096/files/astrosage_kundali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/vitonutafetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/suburban_rv_furnace_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/32183314282.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/2323366899.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_off00005c57.bin
c2e60299375b81be83f9cff0e365649937489a40943aed1434adf8196ad300a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C57 5732 bytes
font_01_sfnt_off00006faf.bin
f891447df82b1cae5ab568e298e90a23b6ff8642ee1aa77fe7de449acb5a4e1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 10244 bytes