Malicious PDF — malware analysis report

Static analysis result for SHA-256 153dc1904d90fc86…

MALICIOUS

PDF

43.6 KB Created: 2020-08-10 20:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35ad14b3398e83a9e5adfc1f58d72e97 SHA-1: 84a5117c5fa53e574f518bb86c3f5a09fbbe08ce SHA-256: 153dc1904d90fc863dff4bfde7e9591e0ae1ae985001c5d4e675350e410d2af2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting it is a book PDF, likely a lure. The presence of many external PDF links indicates a link farm strategy, potentially for SEO manipulation or to host further malicious 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.cc/pify?keyword=amina+al+mufti+book+pdf
    • http://files.finefoliage.com.au/uploads/1/3/0/7/130740124/3505170.pdf
    • http://files.blossomsbygeorgia.com/uploads/1/3/1/4/131411539/dejiwofadogazupemije.pdf
    • http://files.stephentown-historical.org/uploads/1/3/1/6/131636825/2349649.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/tuwezewebedazagizababun.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/62299423208.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/fawodigebojetususege.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/sipodalejuxejeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/cahills_vs_vespers_book_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/affluence_without_abundance.pdf
    • https://cdn.shopify.com/s/files/1/0431/6908/7642/files/aurelia_js_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/91798394360.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/zatusejipoxosive.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2659/files/piriformis_syndrome_exercises_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0451/0213/7496/files/the_arrivants_by_edward_brathwaite.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008617.bin
f703f50246d6e11f5707ca60772b482d8f5b3024fc282575ac941f4c87e66cd8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8617 17932 bytes
font_00_sfnt_off00005286.bin
27db733474b5751dfd7d168bd96d5bd4b17d01fd1cf4b64797f1baf919e905d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5286 5108 bytes
font_01_sfnt_off000063c8.bin
994242413a985d196593ea6ec8440cbd704a42b283f8d877011863cf01c7efa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 9956 bytes

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