Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e50fb484377d414…

MALICIOUS

PDF

35.7 KB Created: 2020-08-06 14:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c50803d2b3083294fd402300f317c001 SHA-1: 8bd338e5184050dbcaa337c11b4ef68fe31d5177 SHA-256: 0e50fb484377d4142284e01fc56509d3539b62ebda3b70d0d22fef3e20946ef1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to Shopify domains hosting other PDFs, suggesting an SEO link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=laxmi+mata+ji+ki+aarti+pdf`. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, indicating an attempt to manipulate search engine results and redirect users to malicious content. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or SEO manipulation attack.

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=laxmi+mata+ji+ki+aarti+pdf
    • http://files.roslyn327.com.au/uploads/1/3/0/7/130775215/3544595.pdf
    • http://files.lucytherescuedog.org/uploads/1/3/1/8/131856567/rolojoxigapi.pdf
    • http://files.bigtrecreation.com/uploads/1/3/1/3/131379612/fasezojozixuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/nisejukotagutofoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/57385363849.pdf
    • https://cdn.shopify.com/s/files/1/0434/0219/9196/files/como_hacer_bibliografia_apa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/new_metro_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/venezebiraviro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/mitijotuximaluvima.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/92690713727.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/futadewofevatekowek.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_off00004f4b.bin
f7e03ed30819bcb88e15fb2110a9366ddbcb1739ee19ede07c27a5758e7f72ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4B 5124 bytes
font_01_sfnt_off000060b3.bin
20ef0c1f45e5a67dc629fc739472f193f4f1f9f7db1afb0383fe2e43c7397ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 9816 bytes