Malicious PDF — malware analysis report

Static analysis result for SHA-256 105c734c3f09c9b0…

MALICIOUS

PDF

42.4 KB Created: 2020-09-17 02:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011430ebfab680bf50ab3c050e30b5c9 SHA-1: 3a38cd4ded8a212bbdaa9f9f4ad4a2b9b00674eb SHA-256: 105c734c3f09c9b08cfe2de6e6287f643ad0ef74b00d055ed290d33cb38c727d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/wix?keyword=yamaha+motif+xf+manuale+italiano. It also exhibits characteristics of a PDF link farm, embedding numerous external links. The document body, though heavily obfuscated, contains references to the same malicious URL and other PDF links, suggesting a social engineering attempt to drive traffic to malicious sites.

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/wix?keyword=yamaha+motif+xf+manuale+italiano
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://17f29728-5552-4508-87a3-d8fe2c9fe26f.filesusr.com/ugd/e3ed1f_2379848cc2464eec86cce1440475e0ec.pdf?index=true
    • https://e42bebea-9057-461c-b594-2fc198535637.filesusr.com/ugd/5bf82b_3e7924b8a5aa461cb60e2b35d037af20.pdf?index=true
    • https://6e958bd2-202a-4c72-aff6-9e9a0df6b12d.filesusr.com/ugd/9c66ff_4271c1be69e346faa71135b73a24a6a7.pdf?index=true
    • https://b0b49505-833c-4bee-b328-94b13a638550.filesusr.com/ugd/10b03a_718cbb74314041d9ac48461603482b32.pdf?index=true
    • https://12062c7c-d60f-4ca6-a7b8-6b868ecb8271.filesusr.com/ugd/3615fb_deaa09df172d4743a7f45eca2ff282b2.pdf?index=true
    • https://5d035c57-546f-433d-81cb-7c631516e42f.filesusr.com/ugd/384ea4_9682d6fc3f6647809f65b0c2323ebdfd.pdf?index=true
    • https://f3545626-ffe3-4878-93e0-39e772a37187.filesusr.com/ugd/b926a8_a337c08a026246e080bcf56a6ad64977.pdf?index=true
    • https://8d585b06-742d-47e2-8b52-0573eb4b23a5.filesusr.com/ugd/4f270c_f537bd2309ba4cfd9f34cac1900c5196.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/sojaguzunex.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/91913224165.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/fixinezuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/yakuza_3_substories.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/shot_for_me.pdf
    • https://cdn.shopify.com/s/files/1/0462/4950/9015/files/rising_storm_2_vietnam_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0464/8039/2344/files/76974708086.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_off00006ac8.bin
5a07e248f2190312f853b8ac9136d91a58f175f244a3e60890552d11271b470f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 4764 bytes
font_01_sfnt_off00007adf.bin
ab3995acd4d40d34d90f3579cdd556a941b444c192d9d4853dfa1bf6338e5c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADF 9912 bytes

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