Malicious PDF — malware analysis report

Static analysis result for SHA-256 47009c9fca9a3f9f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-24 01:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 079a41133f134e7235bf59f9ef296514 SHA-1: b0c86aa7f9712c1121a1a3fc442f2d08344afaaf SHA-256: 47009c9fca9a3f9f14da6499e7db9afa1c418491295d498aa0378d9afc68720d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=checkbox+css+template'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on potentially suspicious domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to a malicious site via the embedded 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=checkbox+css+template
    • http://namabiw.thomas-flores.com/uploads/1/3/1/4/131406665/kilijidaxuk.pdf
    • http://biwoxariv.mhes-ses-bandstrings.com/uploads/1/3/0/7/130776132/83f9b973bfd75e6.pdf
    • http://files.furmansleeplab.com/uploads/1/3/0/8/130873708/turugimuguw-zomoto.pdf
    • http://files.imsmath.com/uploads/1/3/1/3/131381679/futefebikelop_kapenakeb_jaxadike_fufabo.pdf
    • http://files.mantawellness.org/uploads/1/3/0/9/130969633/2911713.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/que_son_los_contenidos_conceptuales_procedimentales_y_actitudinales.pdf
    • https://cdn.shopify.com/s/files/1/0443/9549/5590/files/anglo_saxon_culture.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/menoloberapokudorikux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/81948153737.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/a_ha_take_on_me_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/20246704083.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8123/files/great_fugue_in_g_minor_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/frozen_shoulder.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/75581626016.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/mivininagufubesoj.pdf
    • https://cdn.shopify.com/s/files/1/0462/7198/7861/files/mavuximuzudubesuvok.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/90028364721.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/lavozukijadosogelipup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/lab_equipment_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/kifuxuz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631c.bin
ee4aa118d11f09aa8c3815d081367b1e0d4d5fb6f8349f1e5645423d5c65896a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 5252 bytes
font_01_sfnt_off000074d1.bin
cc52025a7d52eff4916c510b303969b05a0d612b7c825de73fae45da306de3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D1 16036 bytes

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