Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c588de2ef3148bf…

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 19:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00d97200eea6c00c1f5e230b972bc27 SHA-1: 4214bcb1d2f469cec5184d179e1ecc2bb93b7f83 SHA-256: 6c588de2ef3148bf6371418ecbdffc70717f7ace042a0d9a57f3820465e1bfd6
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=bhola+baba+photos', which is likely used to redirect users to further malicious content or phishing sites. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or SEO manipulation tactic.

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/wix?keyword=bhola+baba+photos
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b8c837_d266402472414158b460019f36a765e4.pdf
    • https://static.usrfiles.com/ugd/c1de29_e1c141415ad34d22b6f99a4647adc064.pdf
    • https://static.usrfiles.com/ugd/409ca8_61b44a7a45d44e29aef2d17606098a55.pdf
    • https://static.usrfiles.com/ugd/724bd4_e1e745fd81574930a8089b896cdc9eee.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/85322441322.pdf
    • https://cdn.shopify.com/s/files/1/0440/0565/4678/files/fevapivepukovam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/sunedabogemapuzowagitij.pdf
    • https://cdn.shopify.com/s/files/1/0431/3491/0618/files/28785502548.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/fupopubewidake.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/rupovirojame.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/660701055.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/zusipuxes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/star_method_for_answering_behavioral_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8434/files/class_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/wegadamugagod.pdf
    • https://cdn.shopify.com/s/files/1/0446/6160/4505/files/chase_dreams_kalin_and_myles.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/26888750950.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_off00005ca2.bin
d8b907802410e675ceca2784509e58a9dae2947c1b2ad43e3e0c02687eabed47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA2 2952 bytes
font_01_sfnt_off00006730.bin
deb636f59934e9fd40d2056a164d04a0aaf6bef6421b90ba2f6331eb57fbd86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 5000 bytes
font_02_sfnt_off00007829.bin
78d0b4486b1ca4856fa2f9060da983a816b40ab506e266d732c9de667cb8b74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7829 9968 bytes
font_03_sfnt_off00009a40.bin
d698b3a06f3c27b22d873f9d4f901a46d1ac5ca88cfc5fcfb791b3ee06b19c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A40 4496 bytes

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