Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d916507378407a…

MALICIOUS

PDF

48.4 KB Created: 2020-09-17 13:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08cc234ad9ea8865da81e4176fcfabe8 SHA-1: 54941caf255534bf3bfff03524291c26ed3bd795 SHA-256: 56d916507378407a6591a80460d349e1111754d8b74aa4cc8d0974166a84ba60
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.club/wix?keyword=doodle+god+evolution+recipes, which is likely used to lure victims. The document body contains obfuscated text and URLs, further supporting the malicious intent.

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.club/wix?keyword=doodle+god+evolution+recipes
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/19061994247.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/75909471111.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/winkler_method_dissolved_oxygen.pdf
    • https://cdn.shopify.com/s/files/1/0459/9899/7663/files/beditevefatutodovutatisuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2735/files/lands_end_coupons_for_school_uniforms.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/b_d_chaurasia_anatomy_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/emailing_cv_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/6217844795.pdf
    • https://cdn.shopify.com/s/files/1/0469/3344/2715/files/morningstar_best_performing_bond_fun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/50664966350.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/famusefugalugexut.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/2177962340.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/wowimuledoxulowe.pdf
    • https://1195bfef-98a7-46b7-b24e-17eda10f74d8.filesusr.com/ugd/5b5da7_50a1fc1e09f44eab8148e11ed5ca1cf7.pdf?index=true
    • https://0bc9768f-85c2-4c70-87f7-155b099d7516.filesusr.com/ugd/e2c6c1_0fff557e395b488d8c13901b3a4ef807.pdf?index=true
    • https://0fbad840-05a6-4372-97a0-243c110de460.filesusr.com/ugd/12745a_79b26934534b404d9e4237f216c0582e.pdf?index=true
    • 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_off00007ff2.bin
974f552da96f99e01032c90b585be9031a9f8486131b0a72b91ca561f3a7c15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 5092 bytes
font_01_sfnt_off00009169.bin
40f6c9f4683654370cc3b6a6f2e2ac93e719016e6fee39bc7eac6b3997aedbff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9169 10536 bytes

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