Malicious PDF — malware analysis report

Static analysis result for SHA-256 690a451569616482…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 12:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2abc7c8ded0d39943a624264ed31a436 SHA-1: f80d77b7e93045d381e712b332fb16634a1fb426 SHA-256: 690a451569616482cc6955e9bcb2a7d3d2e589b4aa2001048ae92b9f99f5a6a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for users to click on the embedded links, potentially leading to further compromise.

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=sri+rudram+meaning+in+telugu+pdf
    • http://files.blcmorris.org/uploads/1/3/0/8/130815277/c32a228489354.pdf
    • http://files.innerviewultrasound.com/uploads/1/3/0/8/130874382/tamibijip-vutewejon-rironarexokozeg.pdf
    • http://files.earthcarecollective.org/uploads/1/3/0/7/130738567/14a37d.pdf
    • http://files.mrshammondhistory.com/uploads/1/3/1/1/131163578/8445124.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/71174459623.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/wevimebedufapubuw.pdf
    • https://cdn.shopify.com/s/files/1/0447/9424/9377/files/biomaterials_in_dental_implants.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/digelirexubifuboxojozen.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/nimazonadosigofadutawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/34378568188.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/25357167108.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/pasomesudanofojosunedew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/nizavajagifetazibubifed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007819.bin
863bf528d9ab81eb6c719f3f1f4a79abb6c74a2b7df07190ee1acca84fa26718
pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 5288 bytes
font_01_sfnt_off00008a00.bin
f5ff843c8180803652594716fe31d15affbabf25d863442191d7c5c5bbe42506
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A00 9784 bytes