Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2958a4b2732eb3…

MALICIOUS

PDF

45.2 KB Created: 2020-10-03 04:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e3a79a94f313771a64e330bad18f4d37 SHA-1: cf94deca1e730586717551062fc74eb0bf727c59 SHA-256: 6d2958a4b2732eb3c5167b73b73a7db0f8f84b53c2f7d2344f60018dce8b4cbd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting an attempt to drive traffic to potentially harmful content.

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.club/pify?keyword=good+charlotte+dance+floor+anthem+bpm In PDF document text
    • http://files.savannahgreendirtdesign.com/uploads/1/3/1/0/131070109/9903756.pdfIn PDF document text
    • http://files.farandwidekamloops.com/uploads/1/3/0/7/130776043/9007702.pdfIn PDF document text
    • http://files.winningmentalitygroup.com/uploads/1/3/0/8/130813837/mabezebazabun.pdfIn PDF document text
    • http://files.champaignsoilandwater.com/uploads/1/3/0/9/130969428/jokavawoxo.pdfIn PDF document text
    • http://kenonajos.pineviewbaptist.org/uploads/1/3/1/3/131398140/78457adfd37e042.pdfIn PDF document text
    • http://woxumegag.thestorefrontgallery.com/uploads/1/3/1/8/131872055/lapatopivinuzon.pdfIn PDF document text
    • http://revopum.srinivasan.co.uk/uploads/1/3/1/3/131384424/gubabon.pdfIn PDF document text
    • http://lifeguri.rls-sciences.org/uploads/1/3/1/4/131453046/6359980.pdfIn PDF document text
    • http://dolutapux.covingtonkiwanis.com/uploads/1/3/1/6/131607600/f68964.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7643/0240/files/carson-dellosa_publishing_sign_language_flash_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2766/3514/files/scientific_research_methods_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/german_battleship_tirpitz_salvage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/bepituvemotabumavipikesol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/rexojupika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0447/1713/files/skew_lines_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/millers_daughter_louth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6504/3861/files/joseph_prince_family_2019.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 5128 bytes
SHA-256: deaddc79a3fabe9379c4f857db7431c1e4e7e78d49fcf038752b0ea90dd38c90
font_01_sfnt_off000074ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10672 bytes
SHA-256: 57f652060d86f459094882d5dcf08e45aad05d43782f44edaa69554915a79005
font_02_sfnt_off00009979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9979 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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