Malicious PDF — malware analysis report

Static analysis result for SHA-256 2add490d6ed92db1…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 04:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b29f2ab03d056a3605953cad19f64683 SHA-1: ab7d8d524b2224d726ae349614925cf9451ed0a4 SHA-256: 2add490d6ed92db141049c84a8f7e277a9dc51e99cd975fd66c71c92c2b5f613
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.cc/pify?keyword=informacion+catastral+en+ingles'. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, with the dominant host being cdn.shopify.com. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same redirector URL and several shopify URLs, suggesting a lure to malicious infrastructure.

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=informacion+catastral+en+ingles
    • http://files.digitalxraypros.com/uploads/1/3/1/8/131872107/zijarosirij.pdf
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/rinorigikapaxemunuxenul.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/monitoring_and_evaluation_officer.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/bible_speech_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/tegakafebutudofobiju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/9361995763.pdf
    • https://cdn.shopify.com/s/files/1/0460/6446/8123/files/kewotulaposexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/bulegisibezowoxenakeve.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/wudelabimewekebawokarivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/fedupusiluxonorafanemi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/black_sabbath_paranoid_songbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000597d.bin
11959bc15cbd0e9ec629443571150edb17e887de78e4c0aa83ccabca72e5e014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597D 4928 bytes
font_01_sfnt_off00006a13.bin
1c14a640cc847946b25be3772bf6b7b0678a3fb019e1e3a3d60d4216499e517e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A13 10084 bytes
font_02_sfnt_off00008ccc.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCC 4324 bytes

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