Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73a504f29607af9…

MALICIOUS

PDF

52.8 KB Created: 2020-08-21 14:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6fcc0ea71a191dc4c5d74c7ed63c1b5 SHA-1: ea228de530ae7bccb998dfb6d61114f277719afa SHA-256: e73a504f29607af94061272b7e2b4f130fbcfff9491196228c38534cccfb3765
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains text that appears to be a lure for movie-related content, directing the user to the malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure itself is indicative of a link farm designed to distribute malware or phishing content.

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=cg+movie++karne+ka+link
    • http://nekiz.mirandamollendorf.com/uploads/1/3/0/7/130776225/fexevumilobuxos_kevaj.pdf
    • http://jidepufu.gotlabradors.com/uploads/1/3/0/9/130969284/8107955.pdf
    • http://damegajan.keweenawcastle.com/uploads/1/3/0/7/130775934/navitinukuguwi_pakezivexizobi_gimukariratowog_sanovotituje.pdf
    • http://files.couleeregionfitness.com/uploads/1/3/2/7/132710697/f94c5b.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/qualitative_test_carbohydrates.pdf
    • https://cdn.shopify.com/s/files/1/0435/8973/0467/files/guidelines_for_medicare_and_medicaid.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/clinical_chemistry_rodriguez.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/53073257828.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/11555684227.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/antonio_vivaldi_spring.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/english_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/texas_bill_of_sale_for_car.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9724/files/46728960922.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/31237847594.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5653/files/kupiroxuvujuxuribunopina.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f1.bin
845a31bc6a543e1406cd17af908e78666ea1405db5a3c72474a4ae3939dc93bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 4684 bytes
font_01_sfnt_off000089bc.bin
74d578bc3233f5e39268dfe2b831a52ed24e01b44f4c4d9b19e8d43cfaf2aa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 15068 bytes
font_02_sfnt_off0000b89b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB89B 4324 bytes

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