Malicious PDF — malware analysis report

Static analysis result for SHA-256 d106d31b8caf1b06…

MALICIOUS

PDF

33.7 KB Created: 2020-09-01 15:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e1adfe05034246ae0b41781e6a8679 SHA-1: 32c8fc33b296a65152909476d04a0a3b5b091f13 SHA-256: d106d31b8caf1b06f2c3a6cb72f858da2a4a3a19b91842bb462a876ad6ce0879
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector known to host malicious content. The document body, though heavily obfuscated, contains text related to a 'fronius 27 kw inverter datasheet pdf' and a URL that appears to be a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to known malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm for SEO manipulation or traffic redirection.

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=fronius+27+kw+inverter+datasheet+pdf
    • https://static.usrfiles.com/ugd/1df9ea_8f315daa08cc46de9490866df92afbfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdbd1f4d3c5848d3b01933815f4e4dce.pdf
    • https://static.usrfiles.com/ugd/b8c837_9442942980d449109f7e8df780c43b35.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/affidavit_of_loss_format_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://static.usrfiles.com/ugd/7a11b0_7bce7477ad8a40f1887fd1485f7c17cc.pdf
    • https://static.usrfiles.com/ugd/565485_b17ead6e51c141a3aa69e9eb38569742.pdf
    • https://static.usrfiles.com/ugd/67f5f7_a03d667e363c4976ac3e15899299c748.pdf
    • https://static.usrfiles.com/ugd/136d07_4c5e4e309d8647f1ba560781253ecfd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeb2c51e61864088a723f52a2f679481.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_5e0c78b3c4e347ef9320084217cbd317.pdf
    • https://static.usrfiles.com/ugd/defcb2_df65d4ff8b244bd3a1c77081fe383abe.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_off0000463c.bin
fc3cb6f98d20226e5f5b4a3ac9165110cf028eea12cb95cf56c6d0af82949f76
pdf-font-stream PDF embedded font (sfnt) at offset 0x463C 5480 bytes
font_01_sfnt_off000058ff.bin
b6343a05764279fd38574c53c8a2f31e4ed3d69e55578369b2868ee6a96c8ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x58FF 9660 bytes