Malicious PDF — malware analysis report

Static analysis result for SHA-256 a857769e2510682f…

MALICIOUS

PDF

53.7 KB Created: 2020-08-30 12:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d02e746428bdd3dd0a0a94581fcce4e9 SHA-1: edca9ccb60891b4ed1124cecb32bb9ae6e070134 SHA-256: a857769e2510682f332d1130eab51992ce8813a2b6485232c1939b3b55d0ec3b
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, forming a link farm. One of these links, 'https://ttraff.com/wix?keyword=minecraft+astral+sorcery+constellati', is identified as a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of the malicious link and the link farm structure strongly suggest a malicious intent, likely to redirect users to 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=minecraft+astral+sorcery+constellati
    • https://static.usrfiles.com/ugd/576447_e397ed80d45245a8bf03644f447526e7.pdf
    • https://static.usrfiles.com/ugd/bb13a2_1263162dc8c64c88b9fa9769955c3d5a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a85237944c9407db442d056a75f016f.pdf
    • https://static.usrfiles.com/ugd/6290de_a705622ff4bd4af8ac35e183640ebd73.pdf
    • https://static.usrfiles.com/ugd/9ea91e_16cca4494a634387901350386b6f5fda.pdf
    • https://static.usrfiles.com/ugd/21e6f2_00219010bd384ec58cad6e950e101979.pdf
    • https://static.usrfiles.com/ugd/b8c837_236f357a6a844886b6b9d1d0f9d061e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_40b0e2f330ed48b687c04fd0fa65e47c.pdf
    • https://static.usrfiles.com/ugd/7e6083_7a66d9ad99fd4e7c99657298802d1d23.pdf
    • https://static.usrfiles.com/ugd/33a16d_ecf4478e46a541eb988702a855252b42.pdf
    • https://static.usrfiles.com/ugd/82e28d_ca71d106014d4edfac6bfbc248bb1729.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/lowes_mustang_ok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/kejejipixukutogovuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/80734886332.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_off00009540.bin
42c6ffe6b55fdf014473e157791eab408036387d838d8e23299c7b7228572073
pdf-font-stream PDF embedded font (sfnt) at offset 0x9540 4980 bytes
font_01_sfnt_off0000a645.bin
3a7190fd78c97ba685fbc625b557c9243770a6ab734f9a4a9db61373a151cac9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA645 10540 bytes