Malicious PDF — malware analysis report

Static analysis result for SHA-256 8222edf0b00366b2…

MALICIOUS

PDF

52.8 KB Created: 2020-08-12 06:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faf21c8d8d81593aec0504b0693f15a4 SHA-1: cbd63793686d08f38ec776bd6e9fbdb20c3de256 SHA-256: 8222edf0b00366b277b8f41ad79118eaca5497cf7fcf1f7867f01f00ef4a9e53
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and numerous benign-looking PDF links, suggesting a link farm designed to obscure the malicious destination. No scripts were extracted from this sample.

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.ru/pify?keyword=mind+reader+by+lior+suchard+pdf
    • http://files.straightlinedancefitness.com/uploads/1/3/1/4/131483275/e292dc63081063.pdf
    • http://files.hirojack.com/uploads/1/3/0/7/130776166/dizub_xobopow_zezefugotida_mogakorevuwab.pdf
    • http://files.steppingstoneschildrencenter.com/uploads/1/3/2/6/132695200/2c169ef.pdf
    • http://totakepap.stijndecock.com/uploads/1/3/1/4/131407089/7099330.pdf
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/cancer_epidermoide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/functional_morphology_in_vertebrate_paleontology.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/89328767576.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/vupevenodesidaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/43557361208.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3703/8494/files/58833151291.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/77980340444.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/formative_and_summative_assessment_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/cutting_edge_elementary_third_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/4513008527.pdf
    • https://cdn.shopify.com/s/files/1/0438/9512/8216/files/44978770079.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/5049788929.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_off000090ca.bin
5b17298a6842a216768ce647080d7595c10daec6a00dfa9ab1bd2362a9fd7571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 5488 bytes
font_01_sfnt_off0000a36b.bin
62de6acb3ebdca79b1b93c4b2c5a30e46640840852ee4862e7d7bef5075a0eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA36B 10120 bytes

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