Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d79a8dbdae7f382…

MALICIOUS

PDF

36.7 KB Created: 2020-08-20 04:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96fbd332bd0af9cb563a7b7a9d755b75 SHA-1: 6216e3a3e8067871513789fb3b399bf9a732eac5 SHA-256: 6d79a8dbdae7f382883f2c50709cd8707cbe262f7e1d78e2e148935b95f8e116
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a PDF merging tool. It also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and the overall structure indicate an attempt to lead the user to malicious infrastructure, likely for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=fusionner+plusieurs+pdf+online
    • http://files.falconssoftball.com/uploads/1/3/1/4/131438268/wenolino_repuxobet.pdf
    • http://zejaxop.elementaryschoolheads.org/uploads/1/3/1/4/131406069/barevemogatapajovus.pdf
    • http://files.adventures4rent.com/uploads/1/3/1/6/131606201/5f1abe4b4.pdf
    • http://jorosef.anti-agingbyrjxjelly.com/uploads/1/3/2/3/132303354/8686563.pdf
    • http://files.mentalhiccups.com/uploads/1/3/0/8/130873838/rujomitusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0453/6886/9019/files/52815137754.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/jodojere.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/dresses_with_pockets_formal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/forced_marriage_romantic_urdu_novels_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/44239489792.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/tuvosiwixapirupikagim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/how_to_grow_a_planet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/wosegejelekemipawuteve.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/rigajosemerib.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/riton.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/wikitidimubutojupive.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f9d.bin
15316e903fd5437f95a4c78d204fa5e54336b3c855abcbbaa5496b70c446e982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9D 4780 bytes
font_01_sfnt_off00005fec.bin
942e5947ed8dbfdf9ad550b0a4d6bf11fa059929228224a3ec4a7437360b19f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 11296 bytes

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