Malicious PDF — malware analysis report

Static analysis result for SHA-256 652b6d371a42a317…

MALICIOUS

PDF

56.5 KB Created: 2020-11-01 06:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3da30f7d9d50a9d9b6876ef9ad67a106 SHA-1: 2ea4c9a92847c43770da23294468baa38688f12d SHA-256: 652b6d371a42a3171a8fb9059fcf954433a2fb763f58da83ffebd82ff7e93ec8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many pointing to benign content, indicates a potential link farm or SEO poisoning tactic to distribute the malicious PDF.

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/pify?keyword=azur+lane+retrofit+warspite In PDF document text
    • https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/fudinifababoze.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.pdfIn PDF document text
    • https://muwidewosavuli.weebly.com/uploads/1/3/4/4/134435377/0e930a784edf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/verezikedonirunefotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4280/8223/files/how_to_cook_chayote_squash.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/6638309988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737b4bb9-61c9-45bd-a2fb-9977de2cbfe9/proporcion_concreto_2000_psi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33681b2-2eaa-4eb7-8ab4-1951d9a716da/67609289652.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/buvejutonalobegewe.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/vunateza.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/bibel_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eec7fdd-cf8a-4d79-97b2-421585606d0b/71823309606.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/one_tree_yoga.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6C 5940 bytes
SHA-256: 144088a5aaf34b2d6aee687eeec52e96b476bbe3a85bf7f99380020ef6cc4a72
font_01_sfnt_off000082cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 5028 bytes
SHA-256: e92776125ae9d0850529542f7a06a67286d184d6a613af30ed9d1dd728a37e6b
font_02_sfnt_off00009418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9418 12524 bytes
SHA-256: 995a3434ad49a1d7e317caa7dc88d35f2bd2266cba111dcd45406d94cbae771c
font_03_sfnt_off0000bd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 16616 bytes
SHA-256: 31b95e680d4c8ddf2ce1e2f06423ccced6989478c2050adb17991900f7a5dfd3

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