Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44c118ee0719031…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 00:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d9af57a1051dd9344a6ec17f05977c3 SHA-1: b0a2d30909540b4d28b9a76183967b3747850602 SHA-256: c44c118ee0719031a7ea086593deebc909f4bce313d3d632b643c3eeb28a529b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=eba+esma+guidelines+on+suitability
    • http://rikewoxot.sheldonbryant.com/uploads/1/3/1/3/131379179/bixegimud.pdf
    • http://files.heartfullartstudio.com/uploads/1/3/2/6/132683137/882e7b3.pdf
    • http://files.shotojuku.co.uk/uploads/1/3/0/9/130969974/9530200.pdf
    • http://files.sammyspetfoods.com/uploads/1/3/2/7/132740375/regeruzitaw.pdf
    • http://wizugif.nysfcja.org/uploads/1/3/0/9/130969472/wurilukibubozega.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/pdf_book_reader_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8614/files/biblia_takatifu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1144/0803/files/89145783682.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/31657149979.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/vovekemikazirumelulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/japigobojojoxowisoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/pipezatudipojarubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/ccure_9000_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/pitozifomakeba.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/74232993299.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/53108257156.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/5887429289.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/fotawopinup.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/13053992213.pdf
    • https://cdn.shopify.com/s/files/1/0447/3477/5445/files/english_story_books.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_off00006f5c.bin
4e724317397e1ac094281d8056bd188d68eb5cff7a7f181c2f43c6f0c5d59de8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 5248 bytes
font_01_sfnt_off0000812b.bin
90509cb34a2c3682cfe6966ac22f2561f42380adc602829c4245981625f8900b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812B 9860 bytes

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