Malicious PDF — malware analysis report

Static analysis result for SHA-256 86db1e74d19b653c…

MALICIOUS

PDF

36.4 KB Created: 2020-08-21 00:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 444a3e96f84800fc8298862ce4e67be1 SHA-1: 8f07e6721f7c5a0532e84d2342abff22be100d7d SHA-256: 86db1e74d19b653c03fc55648797f63c06c8ff21b9a7064bffbe3245d77b98b0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=ajagajantara+kannada+full+movie'. The document body also contains this URL, suggesting an attempt to lure users to malicious content. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm strategy. 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.cc/pify?keyword=ajagajantara+kannada+full+movie
    • http://files.theoldguardofprinceton.org/uploads/1/3/1/3/131380666/gajesitosonekat-babadavifotiwiz.pdf
    • http://xujube.edcampatlanta.org/uploads/1/3/1/4/131452883/genulel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/sevigilitabatogawifupasud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/belly_up_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/fupejamijawonu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/national_achievement_test_reviewer_for_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/jane_eyre_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/types_of_agglutination_tests.pdf
    • https://cdn.shopify.com/s/files/1/0440/0388/5214/files/3733038946.pdf
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/87017608400.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/kapumot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/safesuvibadonod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8673/2707/files/83636742428.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/quick_revision_notes_for_chemistry_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/nabovomazawutodevukikuw.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_off000050f1.bin
30cbbc03db7aa30923364a3e3b9e7ea5fed47da32773d86557f0e6e58361169e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50F1 5240 bytes
font_01_sfnt_off000062c2.bin
5728b0a5d8ce282156a0cc36dce21a9ea076348c6e611c2643758be208ac4f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 9932 bytes

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