Malicious PDF — malware analysis report

Static analysis result for SHA-256 9457ed150b984dee…

MALICIOUS

PDF

35.7 KB Created: 2020-08-11 21:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfe4c33d94f0749c43f53e103eded93 SHA-1: 6814e11c025fd2bf21d1b643e549c7cae7961506 SHA-256: 9457ed150b984dee8f78abc6e9e0cfb64ae6fb19d0f7bd07f63d789d606865ec
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL for the redirector and a benign-looking PDF title. This suggests a link farm or SEO poisoning attack designed to redirect users to malicious content. The primary malicious IOC is the redirector URL.

Heuristics 3

  • 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.
  • 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=escala+crom%25C3%25A1tica+clarinete+sib+pdf
    • http://gosex.melatinungsari.com/uploads/1/3/1/3/131384429/zunubesisesujove.pdf
    • http://files.rolfgohdes.net/uploads/1/3/0/7/130775221/begat.pdf
    • http://bipukabod.wesmarconstructiongroup.com/uploads/1/3/0/9/130969204/6920642.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/sujoziza.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/torakoliruvegilanoxazoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/88294138090.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/dekatew.pdf
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/dibat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/kamulisaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/73475837946.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/65456780381.pdf
    • https://cdn.shopify.com/s/files/1/0444/2678/9030/files/warhammer_40k_tyranid_codex.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/56561072041.pdf
    • https://cdn.shopify.com/s/files/1/0440/2062/9654/files/antidiabetic_activity.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/wixarikereganev.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/xapobebogitagopefuxina.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/18489945310.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/calderas_acuotubulares_caracteristicas.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_off00004ddb.bin
50a474b92f3cbba338c568a6dc8c6eee8c879800bfc65c120a82ded677a4a01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDB 5632 bytes
font_01_sfnt_off00006050.bin
c0b0a1acdea8bcacf67f80d91b8da398dd9a404a00686d0b9596fdcc6f1493c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 9708 bytes

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