Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8aefccfd89ec9b…

MALICIOUS

PDF

47.6 KB Created: 2020-08-14 02:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eec3202595ba0d39042e1b6bab20fd45 SHA-1: c87211dccb9fe1269e2d41551f8de0d712024f13 SHA-256: ae8aefccfd89ec9badc3b9f4943ee8748ae0544e494e8c7c3d61f9688f1d2750
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and references sheet music, indicating a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=get+here+sam+smith+piano+sheet+music
    • http://files.kunzeartgallery.com/uploads/1/3/0/7/130739783/ropiput.pdf
    • http://tofoxo.clutchlivin.com/uploads/1/3/1/6/131606577/381de2091ff.pdf
    • http://vajevogup.sijschool.org/uploads/1/3/0/8/130814017/c823bfcf9.pdf
    • http://files.equineofficesolutions.com/uploads/1/3/0/7/130776420/3df6a6d46a807c.pdf
    • http://popakanu.rickydemedeiros.com/uploads/1/3/1/6/131606552/xanonuxege_jobegijinava.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/pandora_s_box_5s_game_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/gilagobuzidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/43975523736.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/handicap_placard_pa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/ruwepuvagozob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/dinutogonoxufusugowenewip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8850/files/tanatologia_medico_forense.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/58739257517.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/53739517400.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/82318305757.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_off00005bb4.bin
6802185f9b35b43c8b21d330697338c5a548373d50f138e20480ead6d1e4cbe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 5172 bytes
font_01_sfnt_off00006d25.bin
bef2d9ca1516ee4221be6044b4d680ea30d2d7623b11616a42a307b7bac8831b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 14972 bytes
font_02_sfnt_off00009bfb.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFB 16120 bytes

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