Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f571cf0cfaebea7…

MALICIOUS

PDF

51.5 KB Created: 2020-08-19 13:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 318ac7ea3efc7cf6e88dfcde3fe14a29 SHA-1: 1d964bf58e90473297aca978e99a3d65b9ef5745 SHA-256: 2f571cf0cfaebea74d1a772da830965c34e192c53906454fad96240785b97414
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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a keyword suggesting a lure for a game database. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary attack vector appears to be social engineering via a deceptive 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.cc/pify?keyword=cardfight+vanguard+database+apk
    • http://files.intmsc.com/uploads/1/3/0/7/130776542/kutoronuk.pdf
    • http://mewogiv.maybellbareket.com/uploads/1/3/1/4/131407241/e215fd.pdf
    • http://tozavuwuw.welcometoboobeebooisland.com/uploads/1/3/0/7/130738731/vepagajol.pdf
    • http://files.littleseedcounseling.com/uploads/1/3/1/6/131636890/moremotibatasi.pdf
    • http://files.nouveaumedic.org/uploads/1/3/2/6/132681826/foxifimap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/cristianismo_puro_e_simples_baixar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/xubomut.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/vefoboxezavasiliwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/sodibunirepefima.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/pdf_to_kindle_paperwhite.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/maps_maroon_5_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/rofinukajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/rogoxaribariwifumigu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/44710635797.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5100/files/mere_paas_tum_ho_novel.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/tipos_de_factores_psicosociales.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ad.bin
c51454922547faa0394e398505d04a3f4a5a7f175a07b3acb96d90bc2bc08124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AD 5328 bytes
font_01_sfnt_off000086ca.bin
a3d7c53fd5e2e1177ae3abe55f29d8b0009326b375302355605bbdfe2e28ed47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CA 14200 bytes
font_02_sfnt_off0000b274.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB274 4324 bytes

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