Malicious PDF — malware analysis report

Static analysis result for SHA-256 11871978759e6fe5…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 08:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b6377daa0a6c0709919af81183cbec SHA-1: a83299ef4eec7213b1b9ff531f41862540c4c7ee SHA-256: 11871978759e6fe590bd5bf323e00e38f293671bb388d03baef789ca6fc3d38d
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes text suggesting it is a project report, likely a lure to encourage clicks. The presence of a malicious redirector and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=online+attendance+management+system+project+report+in+java+pdf
    • http://files.blueskyoga.co.uk/uploads/1/3/1/4/131437149/9953346.pdf
    • http://files.photosbycalley.com/uploads/1/3/2/3/132303083/jojefurefulabi-gisutuxizof-fezawaraxugo.pdf
    • http://files.daviestreeservicesltd.co.uk/uploads/1/3/2/7/132741110/xijibam-gilonotetemutoz.pdf
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131407165/1126974.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5496/2590/files/goldman_cecil_medicine_25th_edition_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/8569/9997/files/mad_about_the_boy_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/69590417121.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/berg_balance_scale_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/boiled_eggs_diet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4495/2471/files/mechanics_and_thermodynamics_of_propulsion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/79084843160.pdf
    • https://cdn.shopify.com/s/files/1/0436/4114/3454/files/optical_emission_spectrometer_principle.pdf
    • https://cdn.shopify.com/s/files/1/0437/2316/1768/files/78422418762.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/rrb_aptitude_test_questions_free_download.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_off00007b04.bin
b139cd5448cc5144a56a51023810cd734bac55bff327eab5e9022f2151396f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 5740 bytes
font_01_sfnt_off00008e8a.bin
766dfd64be2c2b5a52b507096a99fd1c01bb4743d742619bd1a09cea6864e868		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8A 10736 bytes

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