Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b910337d867e8ed…

MALICIOUS

PDF

55.2 KB Created: 2020-08-21 14:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c93613ac8813dc16b7a3f084555c3ba SHA-1: 632c2e8256a7debf03b43bff473a4ccd37e4598e SHA-256: 7b910337d867e8edd1a5d26b89f6520b940664ec920943f6c5b8a44d9e02d5b5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same malicious URL and other URLs that appear to be part of a link farm. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood 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.com/pify?keyword=bridal+mask+episode+1+free
    • http://files.higgins-umc.com/uploads/1/3/0/7/130776578/6688748.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/brightness_not_working_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/ncert_english_book_for_class_9_solutions_beehive_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/84998071.pdf
    • https://cdn.shopify.com/s/files/1/0437/2178/5498/files/how_to_solve_amortization_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8849/files/fotiwomulow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/bewodapikaped.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/54181971651.pdf
    • https://cdn.shopify.com/s/files/1/0432/5805/2763/files/american_freight_fort_myers_fl.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/how_to_speak_fluently_in_english_and_with_confidence.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/wofurubovomibim.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/kubulixis.pdf
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/jumox.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e0.bin
0dd16c610fd63319a4dabf8a10cac08bd28f3df50cfc0a86391543e97192dc73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 10524 bytes
font_01_sfnt_off000081e8.bin
bb245d4b570f1bbcecdf1084c5940aca073f2c804116b5685c969cf3960bfaed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E8 4956 bytes
font_02_sfnt_off000092c4.bin
c38826831187159d795a64a6fe05875799d9917b6996e2de2a60d6332f8acd0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 14460 bytes
font_03_sfnt_off0000bf82.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF82 4324 bytes

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