Malicious PDF — malware analysis report

Static analysis result for SHA-256 291423d06a46362e…

MALICIOUS

PDF

46.6 KB Created: 2020-08-22 01:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e508f854874a02682c5d3f5213cb8967 SHA-1: ab79fff51b2b6d8c1cf672a632c35ef2cdf00d8e SHA-256: 291423d06a46362eb27e5ac2e8173bcc0e4be963993d7746a00a9430c556f06a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded URLs, many pointing to a link farm hosted on cdn.shopify.com, and one critical URL leading to a known malicious redirector at ttraff.ru. This indicates a likely attempt to drive traffic to malicious sites, potentially for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=spring+boot+jasperreports+github
    • http://folupe.bayareamuslimtherapists.org/uploads/1/3/1/3/131379163/1096155.pdf
    • http://files.wsdar.com/uploads/1/3/1/4/131482931/merate-pajofizixalugow-jofexokib.pdf
    • http://rutuj.roannacochrane.com/uploads/1/3/0/7/130775792/koxiz_nipeniwef_lilujazelu_niwafijav.pdf
    • http://files.ncrehabassociation.org/uploads/1/3/1/6/131606121/lixinagigu-pelezeraxuwo-totabitigid.pdf
    • http://files.holmeschan.com/uploads/1/3/2/3/132302999/617a485c44018f.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/worovikorodebeluzogi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/nupefixetekisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/48449004682.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2870/files/ar_verbs_present_tense_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/phaseone_capture_one_pro_11_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/42714342551.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/files/xudosabejirilegopisad.pdf
    • https://cdn.shopify.com/s/files/1/0452/7731/5233/files/buku_agama_islam_kelas_12_kurikulum_2020_revisi_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/curso_de_ingles_en._para_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/nulewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/jitemukupuridaf.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005564.bin
1953e3bbb90d11720c2ecfbb71c381fe953e0e4d73267b6e99cfe83fc4c265a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 5368 bytes
font_01_sfnt_off00006790.bin
0427a5bf4473aa979ebb8f42a1b73a35dd13a72629c0e3bf45cc22188b2f4f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6790 9664 bytes
font_02_sfnt_off00008272.bin
826bd7b9a96523f341774ddb584c9f37cb3042f22d5090fb8dc17a7eb3f99a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8272 13384 bytes

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