Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f1fd9f5822278c…

MALICIOUS

PDF

61.0 KB Created: 2020-08-27 17:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0fef16270a528383c159ea21695056a0 SHA-1: 2f2da749e7340400c1a16249252e99ce39c6b8e1 SHA-256: 75f1fd9f5822278c40550b1656f7f8286136b3654fd2bd30d9f1498244fe518c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior, containing numerous external links. The embedded URL 'https://ttraff.cc/pify?keyword=la+odisea+de+homero' is the primary indicator of malicious intent, likely serving as a gateway to further malicious content or phishing pages.

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.cc/pify?keyword=la+odisea+de+homero In PDF document text
    • http://bifit.bookmydreams.net/uploads/1/3/0/7/130776330/9379161.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/1/0428/9835/8432/files/61086590007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/66391436849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/binitotakewaxifuxolureb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2382/6085/files/83976166761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/algorithms_used_in_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/streaming_apps_for_android_box_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/artocarpus_camansi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/82379619807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/xasodilam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6908/4572/files/79634642448.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_off0000ab89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB89 4976 bytes
SHA-256: b0dc31b8250972bfdc1eb8a866e455dc7933d617156685b16bc18a30e5d927b7
font_01_sfnt_off0000bc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC49 13036 bytes
SHA-256: b5eab767ad07830518c273f195994f7d6ff671afe19fc5340e1a01836af7d146

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