Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19185e3ae04b40e…

MALICIOUS

PDF

67.4 KB Created: 2020-10-26 15:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 515a98d19709eef0983c657f6080eac2 SHA-1: 5bef33c5a9a2c7edbf589761526e37811e7e6c87 SHA-256: b19185e3ae04b40e35c8087609afb51f33cdec72c90afcf7944d02b2451d118a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a user manual, suggesting a lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the primary malicious activity observed is the redirection to a harmful URL.

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.com/123?keyword=xcruiser+785+user+manual In PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/vinoveni.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/jazuvimokuwukix.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/vexedetuvoneramelal.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/zuxezexokomu_jokikin_rajabajota.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://uploads.strikinglycdn.com/files/9ef703b7-47a4-40ff-84a3-e56d13eb1afc/ramesetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7706e63-52d6-497a-a0d9-8421329f430e/nixekisatabuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9fbe6e-3809-4d27-a56f-60df88bcde79/1815905442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29981150-291c-47e0-95b1-9519ae00ca18/easy_boomwhacker_songs_for_kindergarten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5711b39d-765d-4aef-875b-4a2d193c4c3b/garbh_sanskar_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1acea1c2-1297-4405-98f0-8ea9cf9e4acb/visual_impairment_icd_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0f21d7-7ba5-4abc-a76b-307c35ee38e7/44032747801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acba668b-0030-44c6-b056-6d6938f378c3/xasefov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7f6963-894b-4e22-81c7-c76f6cd8c4ab/vumijugawafofagososopifel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/embedded_clause_worksheet_year_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/dolphin_emulator_4.0.2_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/1452/5596/files/meterilusoginudimasuputu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0095/7600/files/32385324573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/vobuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9274/5634/files/clash_of_clans_war_base_th8.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/sordelli_microbiologia.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/tratamiento_fisioterapeutico_para_artritis_reumatoide_juvenil.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_off0000bbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFD 5012 bytes
SHA-256: 17f405bf34528ff1142481a15150bb3cf3706dbb6bea8748c4ef6603d5d09631
font_01_sfnt_off0000cce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE1 10748 bytes
SHA-256: 6712c3b51add094405f4da2185d7c1ea2d80cdc4c9aa0c829ab95f552fdde0f1
font_02_sfnt_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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