Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5b0646981dcb20…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 16:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce12124995746c14db6c56f27b51d208 SHA-1: 57bfb7144b93d34e692db445335f59d398610392 SHA-256: 3e5b0646981dcb20f46b304ff6d001f26b7a4917aad512db2d6463091e7d057b
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, many pointing to Shopify domains, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to cryptocurrency investing and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

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=cryptocurrency+investing+for+dummies+pdf+download
    • http://jotokifi.mainerobotics.org/uploads/1/3/1/4/131453494/8936633.pdf
    • http://files.armandwright.com/uploads/1/3/1/4/131437601/f6e9372eb.pdf
    • http://files.i-tee.org/uploads/1/3/1/6/131637529/xunerunirerenuxopug.pdf
    • http://files.tatrafarm.com/uploads/1/3/2/7/132712530/nolijatetij-wigaxabidusof-ranoretuwovi-gimofidefuzuvaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/dajarupixeladomo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/dekevesozalodivoxokonuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/24119743121.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0434/9345/8070/files/21258956037.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/negima_episode_5_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/91375673653.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/34208629732.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1919/files/memuxitutakupujerudax.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/rekogebemuronafejeluso.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/wosiduxojemesagedunifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/finajojetubibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/19321717545.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c00.bin
0812d9d2553b922ae314618b49a968c1d11de99f58731d74421012fb8a6caafa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C00 5636 bytes
font_01_sfnt_off00006f2e.bin
909930fa45b31973e4e7b49d6284e499d5133b344be651a0c4ca703527874f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 10092 bytes
font_02_sfnt_off000091e6.bin
926021a643e4ec05d8cf5bfaaa379ae9081f7c29da074ea5081ae034101351db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E6 19252 bytes

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