Malicious PDF — malware analysis report

Static analysis result for SHA-256 34917785255409a0…

MALICIOUS

PDF

95.2 KB Created: 2020-08-09 17:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31dc82699f6efdf1e8ec0657c3581ab7 SHA-1: 64cb8ef70bf24c070a7b38705b15098931345094 SHA-256: 34917785255409a076efe8446d7575928d64e873e9b261ab95e2c1b988fd9090
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ttraff.com/pify?keyword=applied+underwater+acoustics+leif+bj%25C3%25B8rn%25C3%25B8+pdf' is the primary indicator of this malicious redirection. The document body appears to be malformed or heavily obfuscated, preventing a deeper analysis of its specific content or intent beyond the malicious link.

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=applied+underwater+acoustics+leif+bj%25C3%25B8rn%25C3%25B8+pdf
    • http://files.cebsnyc.org/uploads/1/3/2/7/132740498/bd08a2091669.pdf
    • http://files.gvfloral.net/uploads/1/3/2/7/132740949/27f97a613.pdf
    • http://files.aiacsrep.com/uploads/1/3/1/3/131380146/wunanazezoxiz.pdf
    • http://files.kbc-ministries.org/uploads/1/3/1/4/131406507/nekozonulasulud-buvibiririra.pdf
    • http://files.drydesign.co.uk/uploads/1/3/0/8/130814605/c76b39089695a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0436/4743/4905/files/adverbs_of_time_place_and_manner.pdf
    • https://cdn.shopify.com/s/files/1/0441/2017/8840/files/new_perspectives_on_xml_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/kagaxurewirijedetodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/ravusuduzidedokasurakuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6673/files/production_and_operations_analysis_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/9198/3512/files/72203272298.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/nokugebowivoviz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/caloric_value_of_food.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/fenusopisuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/jotuwejemogubog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/16363116544.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/bajitakiwulorejulizipib.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/java_codes_games.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_off00011d9f.bin
f0d913bed73af203a627dd039af6ffe8b843609940abedaaa6b96765c17b7da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9F 5588 bytes
font_01_sfnt_off000130b2.bin
158c03c44cd475b27ad13a5133b295b685071e618d70bafbc1771df8c89098d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130B2 11352 bytes
font_02_sfnt_off00015731.bin
e9d42520822ae16d52cacb76d116fd44da5b5768217ea7116fdf800ae99171d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15731 16188 bytes

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