Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d30a4a1d8cb0221…

MALICIOUS

PDF

44.8 KB Created: 2020-10-27 09:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bae2006660d9ec36d0202d29bcc1a6ce SHA-1: d6c3e6ac550daca2ee50fbe38be80f1493367bdf SHA-256: 3d30a4a1d8cb0221d99552b59dbf1f25e33a0fb740f27f8bbdca6984e911d6bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of these indicators suggests the document is designed to redirect users to malicious infrastructure.

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://ggtraff.ru/123?keyword=the+flower+district+nyc
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5f963248b53ea.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8a56c0b3715.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazifozixawus/neck_and_upper_back_exercises.pdf
    • https://s3.amazonaws.com/vikukinumet/16982887994.pdf
    • https://s3.amazonaws.com/jotizifime/emirates_cabin_crew_english_test.pdf
    • https://uploads.strikinglycdn.com/files/12e42a79-e292-4944-ae02-d3855a68f89d/48733415377.pdf
    • https://uploads.strikinglycdn.com/files/ec5271b7-70fe-4b10-97c2-3cc043dcde0f/13151604971.pdf
    • https://uploads.strikinglycdn.com/files/3b381f1e-ff48-49a6-a0ed-2fea962bf01d/25848235867.pdf
    • https://uploads.strikinglycdn.com/files/c70eb347-35a0-4561-a2a5-d8ec8abafb32/t_mobile_usb_modem.pdf
    • https://uploads.strikinglycdn.com/files/3aa17fea-564e-49b6-9a54-66bee474ab3b/nomakafijosupeb.pdf
    • https://uploads.strikinglycdn.com/files/d21fccea-f7c8-4b55-b4e8-c38de8a55be1/marta_train_map_red_line.pdf
    • https://uploads.strikinglycdn.com/files/9d1cc4e0-34ac-43f8-bb46-b3eeac806f31/jumedenofedafigaxar.pdf
    • https://s3.amazonaws.com/jiguwuzobozobaz/bokisaruzubeg.pdf
    • https://s3.amazonaws.com/kawotexulozax/56099205949.pdf
    • https://s3.amazonaws.com/zunaduxa/73645634649.pdf
    • https://s3.amazonaws.com/pazifetanegapu/cfisd_calendar.pdf
    • https://s3.amazonaws.com/busutafitufe/zopajozipegaguwigifimu.pdf
    • https://cdn.shopify.com/s/files/1/0501/9490/7314/files/i_caratteri_del_barocco_storia_dellarte.pdf
    • https://cdn.shopify.com/s/files/1/0483/0973/1483/files/selitikefi.pdf
    • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/hydrogen_bonding_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6658/8325/files/selifajegawuxuk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b5.bin
73b1c9449c8436aa43a43c9dac1c2739e431d7ee94c6ecf4db030b6c08970b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 5040 bytes
font_01_sfnt_off000082f6.bin
d02b9050daced87b2f2b165a58d35b8a3b1a3bcfe50b6637bb6261b9b89abc0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 10092 bytes

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