Malicious PDF — malware analysis report

Static analysis result for SHA-256 71762a66f98e17f5…

MALICIOUS

PDF

49.6 KB Created: 2020-08-05 09:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fd2fc281daf6018782b591b1c568554 SHA-1: 6b0e87cd1430b8d58698a3b5a89156ca1fbbacc7 SHA-256: 71762a66f98e17f5606d46941454cb4bbf4f764f8528b49598ac7602e22e7fb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, ttraff.com, which is presented to the user under the guise of '20 feet container dimensions pdf'. This suggests a phishing or scam attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=20+feet+container+dimensions+pdf
    • http://files.unibross.com/uploads/1/3/1/8/131872048/ce62b.pdf
    • http://files.customgroundsmanagement.com/uploads/1/3/1/4/131453024/550b74970c.pdf
    • http://files.baskervilletravel.us/uploads/1/3/1/3/131384643/fewerotugonomekatut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/14398098969.pdf
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/how_to_make_emotes_for_twitch.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/bavulanolewetaraxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7471/files/kirasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/week_number_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/teoria_sociologista_del_delito.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/texas_vehicle_bill_of_sale_template_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/76148250862.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/how_to_delete_rows_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/31247001405.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/fizejev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/best_novels_of_all_time.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e01.bin
413e83f1b9fa9982937bbcce7023819a5a53103fb23709a39f51b9a344adc5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 5236 bytes
font_01_sfnt_off00007f9c.bin
4b92cc9aaa217423d7c722d9c16b747aa60e70f29177b5f2f73ca5a40a8d3b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 14132 bytes
font_02_sfnt_off0000aba3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA3 4324 bytes

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