Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3eea4ac2777c11…

MALICIOUS

PDF

62.5 KB Created: 2020-10-28 08:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57ac5818d27841c24044f7626d3394f5 SHA-1: 7c977579ae8f043a2e814431ce20edc0087364b4 SHA-256: ce3eea4ac2777c1126cd3ad58c3c7ddb99a7e4d4a6a98fc6b540b80af66598fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to S3 buckets and Shopify domains, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.me/123?keyword=airplane+flying+handbook+chapter+3', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains this same URL, reinforcing its role as a lure.

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.me/123?keyword=airplane+flying+handbook+chapter+3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zepifudoxapo/24463987550.pdf
    • https://s3.amazonaws.com/tofizo/wiveg.pdf
    • https://s3.amazonaws.com/ritoma/1698281585.pdf
    • https://s3.amazonaws.com/zerejibixupav/wetherspoons_breakfast_menu.pdf
    • https://s3.amazonaws.com/henghuili-files2/20696214556.pdf
    • https://cdn.shopify.com/s/files/1/0495/5019/6903/files/rexutasijirabasozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5701/files/exploring_similar_figures_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/keragojinarikelofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/radiology_case_reports_guide_for_authors.pdf
    • https://cdn.shopify.com/s/files/1/0501/0302/5840/files/xifumebejaxuwaseteralum.pdf
    • https://cdn.shopify.com/s/files/1/0479/6953/4108/files/open_office_invoice_database_template.pdf
    • https://cdn.shopify.com/s/files/1/0492/4404/5468/files/tafoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/durinabij.pdf
    • https://cdn.shopify.com/s/files/1/0495/5222/8519/files/86648921776.pdf
    • https://uploads.strikinglycdn.com/files/d2528878-f0e9-4fcd-a4ce-b1a3b8fe9dbc/jirusuxixudiketixim.pdf
    • https://uploads.strikinglycdn.com/files/ef932397-7d9b-40b4-b1e4-c16a1f05543b/putain_de_machine__porno.pdf
    • https://uploads.strikinglycdn.com/files/f387555f-5a02-40b2-90c8-aabbbfce8455/26523575384.pdf
    • https://uploads.strikinglycdn.com/files/390c5ded-be6a-4b90-a974-1f69c54dbdd3/3165359716.pdf
    • https://uploads.strikinglycdn.com/files/3c7edd26-8cd2-436a-acfe-10622b1923e9/bonixibukododewukafiwope.pdf
    • https://uploads.strikinglycdn.com/files/797e7832-a57f-4d92-a2e4-01573eef6bce/ipad_user_guide_for_ios_10.3_download.pdf
    • https://uploads.strikinglycdn.com/files/53943f98-36a3-455b-9a00-f5f509eb06df/40219214000.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_off0000b55c.bin
5e3667d141912ca0898aac1eb12bdd0340d98bb61e68bb139ffa5ab77ecefbba
pdf-font-stream PDF embedded font (sfnt) at offset 0xB55C 5696 bytes
font_01_sfnt_off0000c8b1.bin
9fcbe11a4d108f2a1cb93c3fc7ff445ec047168c47c2f5332cacd32bc8bb6e47
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B1 10892 bytes