Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ae80230b45fb20…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 07:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03e861d60af27f80d3eb5cecb7ef1280 SHA-1: 5798f1a2d4cd57f9b8a6e9aa5772e4d1f5d6b84f SHA-256: a7ae80230b45fb2049f31e59e73474a6a2f2c7986c3329b9a7c024e6f73dacb6
150 Risk Score

Malware Insights

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

The PDF contains a link farm of numerous PDF files hosted on various domains, with one URL pointing to a known malicious redirector. This suggests a social engineering attempt to lure users into clicking through potentially harmful links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=tutorial+cade+simu+v3+pdf
    • http://polofod.estesthemathteacher.com/uploads/1/3/1/3/131398140/1123956.pdf
    • http://files.wizzardsjanitorial.com/uploads/1/3/0/7/130739783/5970882.pdf
    • http://files.k-statebasketballplayers.net/uploads/1/3/1/1/131164048/6544858.pdf
    • http://files.ukulelebuyingguide.com/uploads/1/3/1/4/131483318/defisifosipuruf_falulodikiwur.pdf
    • http://files.sybaritic.com/uploads/1/3/0/7/130740262/e96f7245aee7b.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3453/files/bible_verses_about_restoration.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/wanovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/vokel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/c_o_c_hack_version_2018.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/encyclopedia_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/aristolochia_bracteata.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdf
    • https://cdn.shopify.com/s/files/1/0434/4561/6792/files/farm_business_plan_samples.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/zegelebefubeno.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/8488421269.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/vikegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/27804074137.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_off0000681e.bin
9b9925381d430ce4fbb940cd2639144c4bb3cc5c8e19faba529fac53f95d1544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 5472 bytes
font_01_sfnt_off00007aad.bin
ae70e0e032acaf1f435a36b78abfe7b9f312ac6312d0e7be10da3c0b3caf7a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 10672 bytes

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