Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a053cccbb230bd…

MALICIOUS

PDF

43.9 KB Created: 2020-08-08 01:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74683da6fbc65ad00d9a45babf373dbe SHA-1: 434104ad0cf8b592480adacb83fdb8395e48020c SHA-256: 62a053cccbb230bd430bb1781773e084d2737408a81e9f6e1fb1cf82d9290622
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and numerous URLs, suggesting an attempt to create a link farm for SEO manipulation or to direct users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL reinforces this assessment.

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=frankfort+ancient+egyptian+religion+pdf
    • http://files.busnbreakfast.com/uploads/1/3/1/6/131606670/piganodi.pdf
    • http://files.artsequality.org/uploads/1/3/0/7/130774979/revonijivisigif_kitevirizutev_sasovin_nesegopupozem.pdf
    • http://files.lifewithsqueaky.com/uploads/1/3/1/4/131454986/7902783.pdf
    • http://files.failurefarms.com/uploads/1/3/1/4/131406826/9414637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/nazasiwexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/currency_and_capital_of_all_countries_in_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/11721486645.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/roy_orbison_kalifornia_blu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8775/5432/files/stalker_dual_radar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/bijez.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/blender_recipes_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0429/7087/4009/files/95924641545.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/rimonirudumuperuxavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/92340377121.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/xudegituvimezuvepazitekox.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/codigo_para_control_universal_rca.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_off00006f4b.bin
bbf9258a8f371e7d86e8876879b0a028b47b17c18a1b5d300346ed8cf796c2da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4B 5268 bytes
font_01_sfnt_off00008155.bin
cb5a4900db95033415896c5f602414b2e3ab57abe84eb69e1cd92841c4d243c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 9756 bytes

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