Malicious PDF — malware analysis report

Static analysis result for SHA-256 021a07ef6f7faa03…

MALICIOUS

PDF

38.8 KB Created: 2020-08-16 20:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76837f1bfa4b04b11a9f8d19eddb4136 SHA-1: 38bb3be62ade071dd42dbd0b95dfcf9e5db39c3b SHA-256: 021a07ef6f7faa031b36559f5591c9e5b17c791c3a11c90b3a2552f77832724b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body text, though partially garbled, includes the phrase "Blue prism file from website" and the malicious URL, suggesting a lure to download further content. The presence of numerous PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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=blue+prism++file+from+website
    • http://files.mrsduganshomeroom.com/uploads/1/3/0/8/130814914/marekarokifes-gagigutom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/44624917609.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/30929203950.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/candide_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/kenuwozafureluxum.pdf
    • https://cdn.shopify.com/s/files/1/0450/2516/5470/files/tosabexerofij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zinigezumapafukutogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/nutricion_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/dazorepobidod.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_off00005a86.bin
472095516cdfab2eee91b3309b8aaf1a93c66fdfc96013038c77bb120ab6e9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A86 5120 bytes
font_01_sfnt_off00006bee.bin
820fc8e7b74da2cc5f5dce670a6aaf54fa8456f6aa9f647b0101672380e08d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 10128 bytes

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