Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88ae1f827a6d50e…

MALICIOUS

PDF

50.1 KB Created: 2020-08-14 01:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b4dfc8953bd215a333c9501497f0e07 SHA-1: c16904186fca8a7d12dc3af28f1e1f5afaa48c41 SHA-256: e88ae1f827a6d50eec94b5b9d791d4e850ccf8fa239e692870512094595bd94b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, designed to appear as a link farm for SEO purposes. One prominent link, 'https://ttraff.ru/wb?keyword=complete%20ukulele%20chord%20chart%20pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure by masquerading as a useful resource.

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.ru/wb?keyword=complete%20ukulele%20chord%20chart%20pdf
    • http://dixoda.seanhuttonmusic.com/uploads/1/3/0/8/130874254/3d1a5.pdf
    • http://files.livinggrace.us/uploads/1/3/0/9/130969548/db568b23ce3e.pdf
    • http://files.bestselftherapy.com/uploads/1/3/1/3/131379382/c4efc2252ae.pdf
    • http://files.texasstaycations.com/uploads/1/3/1/6/131636965/dodonipubid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/caliban_s_war_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/dexufobowezutugowiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/38050023670.pdf
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/files/sujojuwovaluk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9629/files/plot_function_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/80330163764.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/fepajewavefugiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/midipegakajunenorulutosen.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/lista_de_adverbios_em_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0454/3342/1982/files/anlage_vl_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/14538255871.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapiguwidekedod.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c7.bin
adadc9e489bb22c066cf190096f163d094b1f2bda36b8df240010868956ee90d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 5032 bytes
font_01_sfnt_off000074ea.bin
b8a6bb13511d4d69349df11de9ea2c64a6e64f72ad041180e814ea90f288063b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EA 10184 bytes
font_02_sfnt_off00009812.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9812 16120 bytes
font_03_sfnt_off0000acfa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACFA 4324 bytes

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