Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea271c52e7ebdd6…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 08:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf02cd8834ed1235c68e1126ea7d2a00 SHA-1: 962c0cab8d297b77dd0c4b8f74299c26569a5e98 SHA-256: fea271c52e7ebdd60a4ecb54c7737e6a2e97f659ff595c5994b315d457256d46
152 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=kaufen+Mariendistel+Australien', which is flagged as malicious. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely to manipulate search engine results or distribute further 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.cc/wix?keyword=kaufen+Mariendistel+Australien
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/ipsec_vpn_configuration_on_cisco_router.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/pujevekaberufulemuwupadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0438/5108/8034/files/95387612332.pdf
    • https://static.usrfiles.com/ugd/cc089a_4bf179d4f795486bb6a8b33c76cddd4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d8f27f1c3a94be4b9f7f1a6f11f55db.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb3c0af041040bc9a71bebce3e967af.pdf
    • https://static.usrfiles.com/ugd/dc51bb_a5f9116ed8df4b9daf97ddfc9f28548d.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/23774127598.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/midanoleluzin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/ordering_decimals_tenths_and_hundredths_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/rizexagupogoguzomuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/45981161368.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/retusizibitikot.pdf
    • https://cdn.shopify.com/s/files/1/0463/1527/4400/files/71860181562.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_off0000723e.bin
7d7cb0a71ba6376a6cdc875536b679d2b51e3072a7581bda1f36ed8eddf4fc04
pdf-font-stream PDF embedded font (sfnt) at offset 0x723E 5056 bytes
font_01_sfnt_off00008395.bin
2689d8ff259fcb71a1bafdf9c5debe9fcbbc67608cf29487d33e71191cb0132e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8395 11348 bytes