Malicious PDF — malware analysis report

Static analysis result for SHA-256 063b8cef1647f5d3…

MALICIOUS

PDF

50.7 KB Created: 2020-08-30 02:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 647677b337e382933c349b5a2d435461 SHA-1: 6149867d77da459a405b4ea839844223571ebe3d SHA-256: 063b8cef1647f5d3e1c94088bc39e69a375cfe6b842e5797ef16e927cad420c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify and other file-hosting services, which is characteristic of SEO poisoning or link farm abuse. One of the primary links, ttraff.com, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to direct users to potentially harmful content.

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.com/wix?keyword=juegos+de+atletismo+para+ni%25C3%25B1os+de+pr
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/82828305192.pdf
    • https://cdn.shopify.com/s/files/1/0462/2401/5514/files/22337196944.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/95851800176.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/75383617278.pdf
    • https://static.usrfiles.com/ugd/824332_36ee964e0eca4ad183f569461e452d6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b62ce61e7b49492f9187ab3132f7c316.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8f7d119cd7a4af69d3d0cf4b5e29ad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca90cdc4ee4248cb9a02fae74eff77a1.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7520/files/pemunidikijito.pdf
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/vogidixaginunim.pdf
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/ubuntu_bootable_usb_stick_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/a_thousand_years_piano_sheet_music_free_easy.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/40422364498.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/69472730961.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/apparel_merchandising_process.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3493/files/coplanar_waveguide_using_hfss.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082df.bin
df5a4cb0c73f31dfb7d7749c033fa772845844f977123323dc1b0133afae5936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 5480 bytes
font_01_sfnt_off00009522.bin
f89855ac95cda5c497ad5c57ccf10a02a3643c363d495418cb3119c54a3f7111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 11900 bytes

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