Malicious PDF — malware analysis report

Static analysis result for SHA-256 e306baeb11b3a461…

MALICIOUS

PDF

42.1 KB Created: 2020-09-08 00:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b745e50cbcdcf59252bc3219a7d1815 SHA-1: 17d9717e56277c299dbe4edfcf0540e89e9bc957 SHA-256: e306baeb11b3a461246571e3975693d917e00a839044d7d36b77f5838d61c3a2
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=best+chat+app+for+android+2019', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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.me/wix?keyword=best+chat+app+for+android+2019
    • https://static.usrfiles.com/ugd/e481ce_a0010e71aa9a47ff97d12fbdae24c11d.pdf
    • https://static.usrfiles.com/ugd/7ba596_9760de7111c64f71b2202bde6317992c.pdf
    • https://static.usrfiles.com/ugd/185811_ef6b6a980419481b8f5dbed5d0bb4551.pdf
    • https://static.usrfiles.com/ugd/19103d_a38fdbbaf21340fcb7ded986384a7342.pdf
    • https://static.usrfiles.com/ugd/7ad284_44e32dac17834b11abbc76a12844a4d9.pdf
    • https://static.usrfiles.com/ugd/6f7357_0c3f2748e1d04241b9d8eb72b0c338c4.pdf
    • https://static.usrfiles.com/ugd/ce77c6_29e1b9053078465e93a42568426cbeca.pdf
    • https://static.usrfiles.com/ugd/2c608b_0d1fc5099de94fbda4af983991cc22d9.pdf
    • https://static.usrfiles.com/ugd/ff3115_08b49ce4e48b40d2ab6faa7b5b98fa65.pdf
    • https://static.usrfiles.com/ugd/ca32a8_623490bf730745dcb8999b8b73fdb08c.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/rosolojidosuzajidipibabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/64520435943.pdf
    • https://cdn.shopify.com/s/files/1/0460/9831/7476/files/31643164852.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/antibioticos_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/36958728469.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_off00006497.bin
ea74ddff7008cc024209c6f45b975deff29804289fbc56996acc7df59260b730
pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5744 bytes
font_01_sfnt_off00007820.bin
38a595a5306943f0e5e86ec16a34022a84f89431164962db418f5a888d56a55e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 10340 bytes