Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16dd6e276ba10da…

MALICIOUS

PDF

105.8 KB Created: 2020-07-23 06:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c146d6cb6511bae4efed804a78d45133 SHA-1: 1644160e567d582768909bcdf654b6cc300406f9 SHA-256: d16dd6e276ba10da74b16f49c35038ba7137a587f97dd5d46eaf784a279c041c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic specifically flagged a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure. The primary malicious IOC is the redirector URL.

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/wb?keyword=valmiki%20ramayana%20bala%20kanda%20in%20sanskrit%20pdf
    • http://files.pantanobaptistchurch.org/uploads/1/3/1/3/131383977/depedeleduzogerol.pdf
    • http://files.lauramartier.com/uploads/1/3/1/4/131437504/6130854.pdf
    • http://files.escaypeent.com/uploads/1/3/0/7/130776142/de1ebd8b1032033.pdf
    • http://files.crps247.com/uploads/1/3/0/7/130776338/jowonevogenexu-vexanib.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/64628168965.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/46318004446.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/26317996382.pdf
    • https://zojozug.files.wordpress.com/2020/07/tekabusi.pdf
    • https://kanijumedox.files.wordpress.com/2020/06/18466348692.pdf
    • https://giduwifun.files.wordpress.com/2020/06/zujajewugowoginaf.pdf
    • https://vosutafoku.files.wordpress.com/2020/07/rekagogutimogigadituzaka.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/makolufut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6464/files/pegukeref.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1349/files/binemubabuzagidinu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/pasitod.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/77773014309.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/mabamebudofurasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/tesiwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/59000467812.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/2018727768.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nedodakamilutejevojive.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_off00016277.bin
bca79205abbd2030149cbccc5d4df523a952259ffaa8dd43bc9fbf502e1d8434
pdf-font-stream PDF embedded font (sfnt) at offset 0x16277 5016 bytes
font_01_sfnt_off0001735c.bin
25e847e10db0314828652c6990c42badea017e38e7844fc4c8c4c342a24c6a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1735C 12048 bytes