Malicious PDF — malware analysis report

Static analysis result for SHA-256 e912ff01c18292c1…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 07:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83839ccb3afcffbbd8758dc5534019b SHA-1: b18939e95c491f7c3ee0ed40da70018bc6d09abe SHA-256: e912ff01c18292c19d5a2a63f96f87d71eee83c04a4bd60b506471d956709c29
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains. One of these links, 'https://ttraff.me/wix?keyword=yapay+%25C4%25B1%25C5%259F%25C4%25B1k+kaynaklar%25C4%25B1na+%25C3%25B6rnekler', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing pages.

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=yapay+%25C4%25B1%25C5%259F%25C4%25B1k+kaynaklar%25C4%25B1na+%25C3%25B6rnekler
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/understanding_the_linux_kernel_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1015/4908/files/12116563334.pdf
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/29028673237.pdf
    • https://static.usrfiles.com/ugd/24853a_cde0609f1dd249ebb554add2bed401b4.pdf
    • https://static.usrfiles.com/ugd/39cb9d_e8e60019ce64450abb240e09340e501a.pdf
    • https://static.usrfiles.com/ugd/1a89c8_9f88791264aa48be866db6c492776694.pdf
    • https://cdn.shopify.com/s/files/1/0437/2470/1847/files/63321444030.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97242885008.pdf
    • https://static.usrfiles.com/ugd/fdee49_2ce1c651b0c044978a6aca0ea70d0093.pdf
    • https://static.usrfiles.com/ugd/b8c837_f26ee052378b49ab8788594b0c1bd47c.pdf
    • https://static.usrfiles.com/ugd/b65acf_3dc3fc14df2341d7b75c14af80daea38.pdf
    • https://static.usrfiles.com/ugd/3b7182_3574daca70d547abb8dc630d35cb5210.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e0c.bin
84fefdbe7c9b5a04b05cd2252642871372f0d350aaf178f0135bf2a90cf4a48b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0C 4732 bytes
font_01_sfnt_off00005e23.bin
4ad4220c0ef3cdb08e428827232aaadcbef8f100e6d26eca746148abc6330845
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 10408 bytes
font_02_sfnt_off00007f69.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 4324 bytes