Malicious PDF — malware analysis report

Static analysis result for SHA-256 748b74d0ba4c30ef…

MALICIOUS

PDF

44.5 KB Created: 2020-10-02 04:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 22e91544b70dc5a0322460a32e1e0e71 SHA-1: 1a35d5b3e0f5d5389a571f08ef6e6f555f839b6f SHA-256: 748b74d0ba4c30ef0c188c918b3447b2620ebecca6b67d355d16288242aea54d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary one redirecting to a known malicious domain. The heuristic firings indicate this PDF is part of a link farm designed to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the target search query and URLs, reinforcing the lure.

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://ggtraff.ru/pify?keyword=gartner+magic+quadrant+crm+salesforce In PDF document text
    • http://files.27westmovie.com/uploads/1/3/1/4/131407214/pezupuvosemasujesine.pdfIn PDF document text
    • http://files.southdevonplayers.com/uploads/1/3/1/8/131871648/3602d20161be9.pdfIn PDF document text
    • http://fofiz.coreenaaffleck.com/uploads/1/3/0/7/130775162/zupemifewokezuw-nojomomafomobis.pdfIn PDF document text
    • http://wokixa.minermatters.com/uploads/1/3/0/8/130874431/111b2eab035ca8.pdfIn PDF document text
    • http://files.smallbatchq.com/uploads/1/3/0/8/130814644/1ce237eaf92.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/xamepokoxoribufu.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/47753468597.pdfIn PDF document text
    • https://site-1039431.mozfiles.com/files/1039431/fuzegipiguzos.pdfIn PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/2939559299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/sebepuvaxidusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4433/4487/files/danobuned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/counterfactuals_and_causal_inference_morgan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3707/6899/files/51165931070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4040/7701/files/sex_on_the_beach_recipe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 5500 bytes
SHA-256: e88fe8c279c75156f6f49d19d09d3cf84fce01febca5fa73592776723476de5a
font_01_sfnt_off00008130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8130 10412 bytes
SHA-256: d6a01202ebe3ae15d0ad88c3a15262d218199829abbe8d3e53b4dd597ac87d5f

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