Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a00e60168f6db9…

MALICIOUS

PDF

52.3 KB Created: 2020-07-30 10:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fec7a8068da52d6a1cdd7417b884b03 SHA-1: 98bf867182144448d69ea6daff012060b1f75600 SHA-256: 59a00e60168f6db902083a6affae6423d996a66736c413334f3ee39a772e31d4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, suggests a lure related to "protein synthesis assignment pdf". The primary attack pattern involves redirecting users to malicious infrastructure via these embedded links.

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=protein+synthesis+assignment+pdf
    • http://files.parnellclothingco.com/uploads/1/3/0/7/130775156/5872982.pdf
    • http://files.empoweredwellness.org/uploads/1/3/1/4/131438814/7144139.pdf
    • http://files.yohmansgarden.com/uploads/1/3/1/4/131454556/susazevozag-bafudasa-penux-vidaz.pdf
    • http://files.empoweredwellness.org/up
    • https://cdn.shopify.com/s/files/1/0440/2577/4245/files/48177003524.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/98058813944.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/gatewavinokab.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/38086642342.pdf
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/43633089996.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/87144704039.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/sinikokogopidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/vilajezozizedutawar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/98085222327.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/pileduxekapovofaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/98996818793.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/32818337907.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/18799310949.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/logufemojej.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_off00008ff3.bin
944a134bf8d8b66db3e4feb6256efcf095625872cc2e59ff5f67535aaa510897
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 5316 bytes
font_01_sfnt_off0000a1d8.bin
438a8dda8375914e216a3f4796ee3566c89cc8a31742035903f2159745aae25a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D8 9992 bytes