Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c99950e193eb2d1…

MALICIOUS

PDF

44.8 KB Created: 2020-08-12 17:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0171ebc78e0e56b14c1cef27c60e4bdf SHA-1: 952e494c4af0f25eed505b714bd74115ea807c27 SHA-256: 6c99950e193eb2d1316c6ffeb2a32920673a691c0cf8f18210dfdc1608bbcf6d
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified as a redirector. It also hosts a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=artificial+intelligence+4th+industrial+revolution+pdf', is a critical indicator of malicious intent, likely leading to a phishing or malware download site.

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=artificial+intelligence+4th+industrial+revolution+pdf
    • http://files.northidahocasa.org/uploads/1/3/2/7/132741198/0e7ca2980.pdf
    • http://bawaru.sabahhomestaykualapenyu.com/uploads/1/3/1/4/131406893/mejumozimutoge.pdf
    • http://files.artistofinkandpaint.com/uploads/1/3/1/6/131637224/2d1c83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/49328253076.pdf
    • https://cdn.shopify.com/s/files/1/0428/6159/2742/files/73505162670.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/88448236483.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/algae_classification_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/51188065844.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/jajuluxug.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/43468118065.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/wetudivof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2354/0124/files/jutaninubomup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1501/files/lamutisabusavanegirekuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/1178267011.pdf
    • https://cdn.shopify.com/s/files/1/0438/0409/8722/files/download_young_thug_good_times.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_off00007007.bin
5046bdf548fea2de22fd5fe4d744066b0529f514da30c5373a05570399094119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 5556 bytes
font_01_sfnt_off000082ea.bin
290ee9ef13966564ad2d3239ca72713ace93b51d37fbdba58c85ecdbdfe894ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EA 10292 bytes

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