Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb51154055714e8b…

MALICIOUS

PDF

44.8 KB Created: 2020-10-29 03:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e1a02229f3a8361884b77a9dbb5d5be SHA-1: 6510201f62ab98ee6ca4c27f12aaf29c5a092f97 SHA-256: cb51154055714e8b6ab0de3c64938792fd46045b599fc3464944a8995b762f1d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm. One prominent link, 'https://ttraff.link/123?keyword=maximum+ride+book+8+nevermore+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same malicious URL, suggesting an attempt to disguise malicious activity within SEO-optimized 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.link/123?keyword=maximum+ride+book+8+nevermore+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b9d50a1d-394e-4b4e-ab51-03173b329828/hamari_adhuri_kahani_female_version_song_download.pdf
    • https://uploads.strikinglycdn.com/files/bf02222d-b554-46fe-a356-913998528de6/47065265304.pdf
    • https://uploads.strikinglycdn.com/files/98dec45b-1a9e-48e9-9bc5-e150091a8a11/mandell_principles_and_practice_of_i.pdf
    • https://s3.amazonaws.com/potofaw/authoritarian_populism.pdf
    • https://s3.amazonaws.com/wilugugo/35720760382.pdf
    • https://uploads.strikinglycdn.com/files/71e9886a-7749-48aa-832d-f6f2485bb5c4/fijalamuxaxemovupazulelom.pdf
    • https://cdn.shopify.com/s/files/1/0266/7855/8899/files/whatsapp_para_blackberry_q10_apk.pdf
    • https://s3.amazonaws.com/wapabefizosumi/arabic_to_malayalam_translation.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/assembler_jpeg_en_mac.pdf
    • https://s3.amazonaws.com/henghuili-files2/voltas_ac_remote_manual.pdf
    • https://uploads.strikinglycdn.com/files/9bcf7400-2a7d-4b22-9b83-16da75d31350/towakikozepobu.pdf
    • https://uploads.strikinglycdn.com/files/07a65add-0d50-414c-a3b8-041abe45cca3/armor_landon_austin_lyrics_meaning.pdf
    • https://uploads.strikinglycdn.com/files/cd0bd339-5629-440f-9fe2-ca5fb5e8f5f1/zowoxalezafewusozoka.pdf
    • https://uploads.strikinglycdn.com/files/59f5d68a-4ed9-4771-b3c0-e2a5d9d3a2d4/32663857723.pdf
    • https://uploads.strikinglycdn.com/files/2987fa35-e95a-4d1f-99e7-facdf014a9ea/pexujafiwotodejami.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4907/files/15396883008.pdf
    • https://cdn.shopify.com/s/files/1/0496/7415/8244/files/59309269512.pdf
    • https://s3.amazonaws.com/kikunojulejuj/22863753685.pdf
    • https://cdn.shopify.com/s/files/1/0483/8676/9053/files/vapelemaxub.pdf
    • https://uploads.strikinglycdn.com/files/4e581b8a-0d80-4781-b482-687b774269df/nizupirabifufuvefokona.pdf
    • https://cdn.shopify.com/s/files/1/0493/1734/7489/files/crescent_hotel_dallas_spa.pdf
    • https://cdn.shopify.com/s/files/1/0502/8403/6279/files/28992246546.pdf
    • https://s3.amazonaws.com/wexukufedepim/xugidelamufeviriw.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eea.bin
a4cebc16fe4934eecf277575657ef407e47cd5174dbbc38040b95ea44c800f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 5508 bytes
font_01_sfnt_off000081a6.bin
828fafdc844733532cd5a4ae030d7970ab9ec8e3af2581b984e15873d203fa02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 10648 bytes

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