Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff7752949421003…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 21:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e0aa71796b36404f4092518c8eb075 SHA-1: ae6ef4918808016218122ad2e172bb78c36d99ad SHA-256: 8ff7752949421003da9150b2c6fc808e0450597c62a072899e93a67fcf3b7d98
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The document body itself is largely obfuscated but contains the redirector URL, suggesting the primary purpose is to lure users to malicious sites.

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/pify?keyword=non+chronological+report+examples+volcanoes
    • http://files.y4f.co.uk/uploads/1/3/1/8/131871786/kixokus-temeteboxonoro-besawulix-pumifuxejiz.pdf
    • http://files.ablesonvet.com/uploads/1/3/1/4/131453990/vilarakuretufo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/microsoft_visio_2007_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0444/4625/3222/files/hindu_baby_girl_names_starting_with_m.pdf
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/63271748722.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/96545998043.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/45343527675.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/florida_driver_license_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/vatimedilesamudukef.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/82809056167.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/esv_study_bible_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/aviculture_villageoise.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/nujuxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/5th_grade_math_test_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/66422043670.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/78410435351.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4c.bin
39ffa691d4205bc89220e3cf2765a70f7ce940ab2a6130d1399bca8bbbb1ce8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5444 bytes
font_01_sfnt_off00007ea7.bin
188f5684a7694d80233a938b3774b5549a95be460915913431dfeb7920439abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA7 9980 bytes

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