Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74c8eb67ad3dc98…

MALICIOUS

PDF

55.3 KB Created: 2020-10-29 12:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ddde3973dd81b4417bc9ac3ce89753 SHA-1: eeae9a0848e69f2be74610bcc59d8eb63c7cf80a SHA-256: c74c8eb67ad3dc98addf7e2409dfbdc17d088f43f84c2125b5941174292caab6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?keyword=great+gatsby+clothing'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are likely intended to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/aws?keyword=great+gatsby+clothing
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/xuwupemozaximip-rajobunu-nugeneluzota-jukirutaki.pdf
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/6419222.pdf
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/senejorumeva_turomav.pdf
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/gofumegolabal.pdf
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/9124817.pdf
    • https://tozarezev.weebly.com/uploads/1/3/4/3/134374844/figogolaga.pdf
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/6887914.pdf
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdf
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/23585.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0492/0410/1284/files/3ds_capture_card_installation.pdf
    • https://s3.amazonaws.com/digigitusuduk/burn_after_writing_book_five_below.pdf
    • https://cdn.shopify.com/s/files/1/0459/0010/3834/files/rewedigixanewixuf.pdf
    • https://s3.amazonaws.com/wixanarer/lanulosawavuvi.pdf
    • https://s3.amazonaws.com/susopuzupure/37226013485.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9195/files/manualidades_con_frascos_de_vidrio_para_bautizo.pdf
    • https://s3.amazonaws.com/nonipesikiri/4826623913.pdf
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/alphabet_worksheet_for_playgroup.pdf
    • https://cdn.shopify.com/s/files/1/0478/0061/5071/files/tijugamesubo.pdf
    • https://s3.amazonaws.com/naxizugenabi/57434525256.pdf
    • https://s3.amazonaws.com/luropi/apprendre_le_franais_cp_gratuit.pdf
    • https://s3.amazonaws.com/mijedusovineti/zepananimipapotor.pdf
    • https://s3.amazonaws.com/ritoma/56826555671.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_off00009944.bin
c8256a82ac717d039432dec24906d02db42ef7934be2dee3308ee83e726b8901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9944 5332 bytes
font_01_sfnt_off0000ab6a.bin
13666c7083d99e2af24e206008172191205b32235698ae02d2f864ea756c76fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6A 10640 bytes

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