Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7de5053f0bff3f…

MALICIOUS

PDF

44.7 KB Created: 2020-07-30 21:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29d1f08a3232f6543c1aa1a78a61dc6c SHA-1: 4c82d97ed4d3cb5aa9004eeeffa2dbac9c01ec4f SHA-256: 9d7de5053f0bff3f24ebca3cfb6ff4fdce252fcca0ff85fa458727b4d3a00b9f
154 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Punjab budget 2020 19 pakistan pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=punjab+budget+2020+19+pakistan+pdf
    • http://files.romehospitalfoundation.org/uploads/1/3/1/3/131380870/rumipeni.pdf
    • http://files.andonakakis.com/uploads/1/3/2/7/132741375/3749651.pdf
    • http://files.transformationtheatre.org/uploads/1/3/1/4/131483267/8095797.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/wizozivanivujofaselumovo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2190/8640/files/golofiluvuxorux.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/burewesifikutuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2284/files/53366716742.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/36384828290.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/rafiwaxegep.pdf
    • https://cdn.shopify.com/s/files/1/0436/2049/9616/files/63857780973.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/futevurabonepesami.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/natonopiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/5638/1597/files/bilowurajotojovurajonutim.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/lojabafemipifisezeraveli.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/
    • https://cdn.shopify.com/s/files/1/0434/1419/2284

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007029.bin
96705bdf4e1380806a9f9548cbb9fd3b563edd8922df200e214f1d83561e4f81
pdf-font-stream PDF embedded font (sfnt) at offset 0x7029 5616 bytes
font_01_sfnt_off00008359.bin
5dbb4aad701b883394b55ec1144cb57b1556bf39a05caab32585b254253e5e51
pdf-font-stream PDF embedded font (sfnt) at offset 0x8359 10104 bytes