Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc15f2782874f7b…

MALICIOUS

PDF

42.2 KB Created: 2020-10-15 20:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6ae0a45b7a9efe16949fb3a5c0a8fc5 SHA-1: 3e19ff6a986d2eb4b14b1d9729281bdf11fd4e13 SHA-256: 7dc15f2782874f7bdadb86bf9ee8c14d53dd2618df20b59d22189c699c0f8342
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/123?keyword=if+clauses+%25C3%25BCbungen+mit+l%25C3%25B6sungen+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86f65d5947c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f875ae6ad605.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/pusimetusut.pdfIn PDF document text
    • https://site-1040179.mozfiles.com/files/1040179/31534685387.pdfIn PDF document text
    • https://site-1040975.mozfiles.com/files/1040975/87265813179.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/93051173522.pdfIn PDF document text
    • https://site-1048442.mozfiles.com/files/1048442/wafozekebosem.pdfIn PDF document text
    • https://site-1043646.mozfiles.com/files/1043646/19069427688.pdfIn PDF document text
    • https://site-1043098.mozfiles.com/files/1043098/vadunijesovufipuju.pdfIn PDF document text
    • https://site-1048531.mozfiles.com/files/1048531/40917388185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd8e5f4-1e83-4dfa-8516-1f17f71763ac/gemoxodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd3faca-599b-4176-80f1-7c0c4a09ee0f/gegapudoxetibefuwoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41f6efe-86e5-472f-a140-2ca7cdc069f6/merunakaxelugaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3915da99-318c-4e33-bfb8-a1ac8d613d63/13864042866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69d2c49-3580-4ff2-a505-aabd08695e64/43181981398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1354/1529/files/skechers_go_run_ultra_r_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4838/9786/files/wemav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8808/files/how_to_fade_out_in_garageband_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8446/8390/files/android_home_screen_floating_button.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7835/6644/files/weighted_dragon_ball_shift_knob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5482/0247/files/viruses_diy_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3351/files/frsky_q7x_australia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 5716 bytes
SHA-256: 36e47c6f00e137c76bb906ec82d1da167b4bba7b644301389f63d602a3a6e8a7
font_01_sfnt_off00007428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7428 11380 bytes
SHA-256: 7849539d77bf01c16409db6a1358dfd16d6def6ee21185f67b3fac068d64b92b

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