Malicious PDF — malware analysis report

Static analysis result for SHA-256 190b8801e53373c7…

MALICIOUS

PDF

43.4 KB Created: 2020-08-05 23:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce32e6a0b932f0bb75b95be3a7fdbca SHA-1: 38eda6d2a0f309f08192332e7e8e2326cedef68b SHA-256: 190b8801e53373c7a997c7578cf500915500847b8a6d7716247a3be92c195b28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, many pointing to external PDF files. One of the primary links directs to a known malicious redirector, suggesting an attempt to distribute further malicious content or engage in SEO manipulation. The document body itself appears to be largely corrupted or obfuscated, but the presence of numerous links is the most significant indicator of malicious intent.

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=building+information+modeling+planning+and+managing+construction+projects+pdf
    • http://files.penny-funeralcelebrant.co.uk/uploads/1/3/1/4/131406610/pomuvefaf.pdf
    • http://files.aim4theworld.org/uploads/1/3/1/6/131607158/96169.pdf
    • http://files.msdooleysscienceclass.com/uploads/1/3/2/6/132681359/5ab48e977.pdf
    • http://ruxigo.pmsmachinery.us/uploads/1/3/0/7/130739227/lisogekaguw_tijivuvugun_dazoxakavimaz_zilizadofevenil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/32604362575.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/im._swaggin_im_ballin.pdf
    • https://cdn.shopify.com/s/files/1/0446/9896/0026/files/how_to_change_discord_picture.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/administracion_hotelera_y_turismo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/fenotiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/karthika_puranam_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/cfa_level_2_alternative_investments.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/72984023941.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/winkler_titration_method.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/baxijis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/53343212565.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_off000068d7.bin
c3b7d8b0e03675c37fac849b5854df1d57824e1ae10f48e9682d567523cd5e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 5600 bytes
font_01_sfnt_off00007bd5.bin
588fd2dabaf4cf0e25adef61a75b2f8daa20b518bde85d69a1a2b7a7a00e9cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD5 10516 bytes

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