Malicious PDF — malware analysis report

Static analysis result for SHA-256 7741cbe647fb521f…

MALICIOUS

PDF

51.0 KB Created: 2020-10-10 23:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 58c5dc271aaf358903976aab9da43133 SHA-1: 6f6b4343176d7c3c26e5953d6e8e5a6a4e31e9a1 SHA-256: 7741cbe647fb521f92dfc236713dd9ee4bab0a786df0d61f9060354049fe8b9e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'gettraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The ML classifier strongly indicates maliciousness.

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://gettraff.ru/pify?keyword=my+disney+career+on+the+hub In PDF document text
    • https://site-1043878.mozfiles.com/files/1043878/rolemimaw.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/xexotupokepud.pdfIn PDF document text
    • https://site-1042276.mozfiles.com/files/1042276/bifakarij.pdfIn PDF document text
    • https://site-1038337.mozfiles.com/files/1038337/22467022761.pdfIn PDF document text
    • http://files.marypoppinscc.com/uploads/1/3/0/8/130874285/bokapif_firutufaxevokez.pdfIn PDF document text
    • http://jomiwetek.christtrinitysheffield.org/uploads/1/3/1/3/131384226/fdcbb274fb423.pdfIn PDF document text
    • http://files.rebeccaocainlaw.com/uploads/1/3/0/8/130813646/73312de.pdfIn PDF document text
    • http://lapogum.sbmcwilliams.com/uploads/1/3/0/8/130813117/dokidajexuxopafujix.pdfIn PDF document text
    • http://kuxugov.themettacentre.com/uploads/1/3/1/3/131381464/mikis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2182/0058/files/rewigosul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5701/6732/files/mm_to_micron_thickness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/helix_piercing_jewelry_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8717/6900/files/is_cao_an_ionic_or_covalent_compound.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0263/8748/files/little_house_on_the_prairie_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/36789726456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2307/5998/files/94000839354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2924/0727/files/49210991743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7369/4613/files/75579130872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/39898303002.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000888b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888B 5244 bytes
SHA-256: baa6da946d006d98c46387e18173b46c97b3b0caae0248971546adf1ad217000
font_01_sfnt_off00009a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5C 10832 bytes
SHA-256: 26b94d70e87035ae0605f81ebe655bdc34336343faefb22ab05981cc86584629

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