Malicious PDF — malware analysis report

Static analysis result for SHA-256 417d9ff46587daaf…

MALICIOUS

PDF

61.0 KB Created: 2020-09-01 23:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c84ab3424d2f41fa36bdd423eec98a55 SHA-1: ed745223172e03fa77ec70d17192f77b446c7f6b SHA-256: 417d9ff46587daaf0cefa8b345ad3197daf692c76f5953007f84f9443325b286
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.link/wix?keyword=me+before+you+pdf+bahasa+inggris'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

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.link/wix?keyword=me+before+you+pdf+bahasa+inggris
    • https://static.usrfiles.com/ugd/ddb60a_964c923a1aa045fba2c5c1b580dbaac2.pdf
    • https://static.usrfiles.com/ugd/3f8d85_284f2bdee9bd46cabeaef288462819a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7158018ce86b44ffa626a76abc9a9b06.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e879196731f4fcd8f61cb0a8b758c74.pdf
    • https://static.usrfiles.com/ugd/917232_69deb8697a444cb9a054c515cc86150a.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/17456843163.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/76201199377.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/mowukovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/sakixe.pdf
    • https://cdn.shopify.com/s/files/1/0460/7043/1908/files/13382429384.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/mulemilirafomigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/sarabun.pdf
    • https://cdn.shopify.com/s/files/1/0441/0333/6088/files/bujobeboranasesije.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/memories_on_tv.pdf
    • https://static.usrfiles.com/ugd/80c1db_4a2555da871b49ad913e4e3a82a85cf9.pdf
    • https://static.usrfiles.com/ugd/f515ca_5af454040e7e4e9888d8675d38696069.pdf
    • https://static.usrfiles.com/ugd/269bb8_83208d4a85814998b14bc54d45fb8adc.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_off0000b0c0.bin
4a1c7a889d6999a5b053ca7747c7cd8aaf495be8847ef3bae6ea749be7ee844b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C0 5520 bytes
font_01_sfnt_off0000c38b.bin
55263d6f2405241bc8f086ae934115afabf6903a6b1fc4495362e7abb49490d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC38B 10288 bytes