Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b468dba35bdf867…

MALICIOUS

PDF

49.1 KB Created: 2020-10-02 00:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9cc20d5dd18f6bc08df0bf18fcc29291 SHA-1: ae045eb1535ec2730b5669e76081a4c927bc068e SHA-256: 7b468dba35bdf8671a1070b27834e9547897892e12c30ef5bcb4f36ba90637ed
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.link/pify?keyword=hobo+simulator+games In PDF document text
    • http://bufavabin.africaeuyouthlab.org/uploads/1/3/0/8/130873784/fe85df0546.pdfIn PDF document text
    • http://begapa.heavenlysolez.com/uploads/1/3/1/4/131454526/ditikekubifisasusus.pdfIn PDF document text
    • http://wapoxes.muphipvsouthbay.org/uploads/1/3/2/6/132695306/lidijo.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/56108199448.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/26016330035.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/zobekad.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/87282933715.pdfIn PDF document text
    • https://site-1040771.mozfiles.com/files/1040771/pirazilemeved.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e9af5b-2ca9-4203-8cb8-142ecaadfcc5/68209269775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a64612d-4805-4d89-bf7d-ff5627149e62/pixefavozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481ec7bd-b7bc-4cef-a89b-c928ff5afc39/kobabawofebib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/rich_dads_guide_to_investing-robert_t.kiyosaki.pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1014/5694/files/big_sams_italian_salad_dressing__marinade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1814/4925/files/ranku_darbo_papuosalai_is_karoliuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/high_school_dxd_manga_ita_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/tofuxoterefogaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5104 bytes
SHA-256: d8f91fad78c7152667de0294ecff832601a954b2dc583b684cb4875d4867861d
font_01_sfnt_off00007d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D60 10800 bytes
SHA-256: e6ff009d2463b988b328296dfbb28f639b38f61c9a1122f9a08146f4aca18a06
font_02_sfnt_off0000a269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA269 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9

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