Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1eca8b455842c76…

MALICIOUS

PDF

49.9 KB Created: 2020-08-28 05:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5bc5cdd7af4b06ac287aa282e31da8f SHA-1: 6de533c146db6dceab8c0812d370e47396c47b56 SHA-256: f1eca8b455842c767d4c05aa12ea173e16177b4f99907ccd1beedb91c300bcd6
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at https://ttraff.ru/pify. Another critical heuristic identified a PDF link farm, with a prominent link to cdn.shopify.com. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=jitter+click+test+world+record, suggesting the document's purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=jitter+click+test+world+record
    • http://files.angelfacejewellery.com/uploads/1/3/1/4/131452935/3188974.pdf
    • http://limuso.tucsonhopshop.com/uploads/1/3/0/7/130740086/giwadogasu-vanelejemarim.pdf
    • http://files.adrayer.com/uploads/1/3/0/7/130776073/5966019.pdf
    • http://ginij.positivelyleah.com/uploads/1/3/2/6/132695744/2ec6c84c.pdf
    • http://tutepat.emotionsinwriting.com/uploads/1/3/1/6/131637027/43d979e5bc15f2.pdf
    • https://cdn.shopify.com/s/files/1/0434/4542/0188/files/toruf.pdf
    • https://cdn.shopify.com/s/files/1/0440/2026/9221/files/fabelhafte_welt_der_amelie_piano_noten.pdf
    • https://cdn.shopify.com/s/files/1/0434/3008/4760/files/guzaluvazezovenubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3821/files/antigone_sophocles_don_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/19894549493.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/dmv_form_mv-_104.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/35506937054.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/pudimixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/get_highcharts_to_png.pdf
    • https://cdn.shopify.com/s/files/1/0434/0616/4135/files/tatejukudevif.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_off00007b1b.bin
ce476294acdfc800842347504b44b6433fa4054d9454e7c811caad4da1dfaa2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1B 4552 bytes
font_01_sfnt_off00008aad.bin
a48819419b0da4e7c715d9553504548edb00dccf0f99df01278764c4ad6b0858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 9796 bytes
font_02_sfnt_off0000ac21.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC21 4324 bytes

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