Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aadd7db41a882e2…

MALICIOUS

PDF

44.6 KB Created: 2020-08-11 18:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e680b57dc3c5c63abfd0fdbe46522b SHA-1: 89744e014b8e8ac1158264c7776007f3d455e32f SHA-256: 7aadd7db41a882e2b6f4b64038398de476c5867fe6af8e7ae2b911d77e1400a9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique commonly used to create SEO link farms or redirect users to malicious sites. One of the primary links points to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the PDF structure and link farm heuristic indicate a social engineering attack aimed at luring users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=absceso+hepatico+amebiano+en+ni%25C3%25B1os+pdf
    • http://files.ccdcohio.com/uploads/1/3/1/0/131070476/pegativufakuk-titupasigu.pdf
    • http://files.jodi-duncan.com/uploads/1/3/0/7/130775413/799451.pdf
    • http://files.adobeforfashion.net/uploads/1/3/1/4/131437402/6424684.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/50455290754.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/fujanuvezofotakajafager.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/92417805107.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/74646595837.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/27970288792.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/tavufegurosumon.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/biwosuzazibuvawumup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/gewinukinamigemalobaweza.pdf
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/aircraft_maintenance_programme.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/mepimusofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/ielts_writing_task_2_vocabulary_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/navigate_beginner_teacher_s_book.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_off00006ccb.bin
2bbe4b555cb8417fadaf5a4231d4de3285e3d6f63ee9bb03f8c9adbf8def4d65
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCB 5608 bytes
font_01_sfnt_off00007f67.bin
1c95ef7e21b00e95802a62e281ba2be8bdebd19540b9411e7a216f1d29c87115
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F67 11084 bytes