Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f005c22d333881…

MALICIOUS

PDF

47.4 KB Created: 2020-07-28 19:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d697f1d529649c00ec5a675a26f1a2b4 SHA-1: f84387196ba05fc7e2e4797764c4cc80e40dd43d SHA-256: e8f005c22d3338816f2fe6cc824e738551f035b9c2e7a41bb68554197971c93a
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'South of France travel guide book'. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful sites via 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.com/pify?keyword=south+of+france+travel+guide+book
    • http://files.magicnorumbega.com/uploads/1/3/1/4/131453247/jukisosajax.pdf
    • http://files.soniagfh.co.uk/uploads/1/3/0/7/130740165/kajipunazotuxe.pdf
    • http://files.enrichnaturals.com/uploads/1/3/2/6/132695915/gubedivovafakeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/50474816017.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/96738326452.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/36734695764.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/63990930944.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/lezokilirogopes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/52400572823.pdf
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/17483159331.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/9571585681.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/diputunipilizinonog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/voxusurijirovijux.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_off00007ba5.bin
149fe48ddee024b1513a92ef22b36b337289076787e790f48ce6d19814f865be
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA5 5356 bytes
font_01_sfnt_off00008dcb.bin
587ea7d0075770b70fa79a4d4730eba9b5f732e3bcbfdface02d34265f1bc076
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCB 10376 bytes