Malicious PDF — malware analysis report

Static analysis result for SHA-256 4103dc06fa053c23…

MALICIOUS

PDF

49.9 KB Created: 2020-08-04 01:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95989dc86110d32c02d94b6c50e89ac9 SHA-1: 184e9ff5cf398a3a2b96d0525f030cd74b14e486 SHA-256: 4103dc06fa053c23b21ddc446e4544f9d7a8fc152a867b171c7c48a02cf84a9e
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, characteristic of a link farm or SEO poisoning attack. One of the primary links, 'https://ttraff.cc/wb?keyword=economic%20development%20theory%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to drive traffic to malicious sites under the guise of providing PDF documents.

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.cc/wb?keyword=economic%20development%20theory%20pdf
    • http://files.aussales.net/uploads/1/3/1/3/131379049/biwavomag-tojunomax.pdf
    • http://jekapovi.leosusa.com/uploads/1/3/0/7/130775612/4137578.pdf
    • http://files.crescentmoonconjure.com/uploads/1/3/0/7/130775557/sibosidifiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/smt_apocalypse_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/vemekuvivapuzod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/dissociative_identity_disorder_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/mekasifamof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/pictures_on_chromecast.pdf
    • https://cdn.shopify.com/s/files/1/0432/8534/8510/files/rug_doctor_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/21749246200.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/wordpress_get_featured_image_url.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/nibizinogamoderalojojaman.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/74201366920.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/63345334468.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_off00008480.bin
8de4b6848b580ae2c49413218eac480606171cf8a1280072e241af2be5c69b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 5128 bytes
font_01_sfnt_off000095db.bin
8c6c70c594dd8290b2323a8e6cf767506ced278a8112e3f6797f9927a924b1c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 10896 bytes

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