Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaaea5e827a953b…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 01:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 370712853c516607879618b8ab8321aa SHA-1: 65110894f3f1d26c488c6fed7419bbe54d6beab3 SHA-256: 2eaaea5e827a953b8ca86d42a7de0721b9d5a8a61e313c74bcd7f99f1e70f069
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to domains associated with link farms and redirectors, including a critical finding for a known malicious redirector. The document body, though corrupted, contains text suggesting it is a user manual, which is a common lure. The primary malicious URL identified is https://ttraff.ru/wb?keyword=iogear%20kvm%20switch%20user%20manual, which is likely used to redirect users to further 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.ru/wb?keyword=iogear%20kvm%20switch%20user%20manual
    • http://files.utah-gsd-schutzhunde.com/uploads/1/3/1/3/131380739/doxokaxutasof-sakowixof-melif-vifofumati.pdf
    • http://files.princetonfamilywellness.com/uploads/1/3/2/7/132740362/zixokifafiwivojij.pdf
    • http://getajenej.dennisandkaterina.com/uploads/1/3/0/7/130739227/remow_gitesuxitus_valugijut_xonilelunokiv.pdf
    • http://files.celeraproperties.com/uploads/1/3/0/7/130776886/03d7c19af18cb21.pdf
    • http://files.kalenit.com/uploads/1/3/2/7/132710743/jolezajatenixoxuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/pafewozuluverajutewujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/copleston_history_of_philosophy_volume_5.pdf
    • https://cdn.shopify.com/s/files/1/0438/2693/8018/files/44358801111.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/sakogomaser.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/ruvegaremoxewomiwireri.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/70576621850.pdf
    • https://cdn.shopify.com/s/files/1/0435/7203/5739/files/jurnal_tentang_agama_islam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/10664327820.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/23746886327.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/medieval_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/76263807620.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_off0000556f.bin
0c673b775035f38c39308884f3c10ec4fe45d6cb61588ca42fe27effb167e431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 5364 bytes
font_01_sfnt_off000067a5.bin
5f5371d60ea88a32cc37a1db8cf8156c90ee3e7f83d6b341100b904d7a5ececd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A5 10312 bytes

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