Malicious PDF — malware analysis report

Static analysis result for SHA-256 196752b4ec5e0583…

MALICIOUS

PDF

50.9 KB Created: 2020-08-20 09:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dedbf54b4cd5ba8475de081692ebda6 SHA-1: 7be6dd9782fe7b195d3f4c3977031a2e4881a854 SHA-256: 196752b4ec5e058374acd3959de9fc804be938615271484f8eab4e6aae226cd2
154 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, which is likely intended to lead the user to a malicious site. The document body, though partially corrupted, contains text related to 'Cavy animal information' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm used for SEO poisoning or distributing malicious content.

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.com/pify?keyword=cavy+animal+information
    • http://files.windycityknittingguild.com/uploads/1/3/1/4/131438111/9606516.pdf
    • http://ruzasas.decker-brothers.com/uploads/1/3/2/6/132682883/39e6c33.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/6481/8838/files/rixomojimuzes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/kerodojaletixewolutopavow.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/pepasodilopibidikukunibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/11064351669.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/99178869380.pdf
    • https://cdn.shopify.com/s/files/1/0462/3305/9479/files/clifton_beach_hobart_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/warhammer_40k_codex_8th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/forklift_driving_test_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/pulelogowatazurima.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/50263558236.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/mabazuderuvafa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f1e.bin
0b499f8c704f3a90ff80df247feb6043c4724c86f7a894627ebf979c08f8e1d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1E 4592 bytes
font_01_sfnt_off00008e9a.bin
a6fe96bcc5ad6107d8d9496d0c47f3168516766d6615f758c91396baf4972287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9A 9880 bytes
font_02_sfnt_off0000b072.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB072 4324 bytes

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