Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd7133f5aef45ca…

MALICIOUS

PDF

54.8 KB Created: 2020-08-21 20:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f04d1cfc9242b1834b8fae0e74e1a68f SHA-1: 42b72b56c853829479528ea1d6dd4ab42515f858 SHA-256: ddd7133f5aef45cadbb6eedb09c955f007d3387c07984f74e40b49668625af6c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and references 'mandatory reporting sa aged care', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=mandatory+reporting+sa+aged+care
    • http://jewoput.simplycakesmiami.com/uploads/1/3/1/4/131437987/nasetetopigegi_lewewanenopisaj_baxaxi_letokesav.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/68801673555.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/riwerolukivurodarexato.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/gugegekiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/fowojujejulonedoforeroxar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/gutuvajesese.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/dexofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/luvobafodalotaso.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_off000099dd.bin
f2b828bc80495c14b20ea90dd71d5884b15ae1a10a526ccce8a368c0d36fe2a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99DD 5316 bytes
font_01_sfnt_off0000ac0c.bin
08b7f7ad27ce1c265a1e255c57624743e33f954cc7d4f0a52f9ecb64deb0b95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0C 10096 bytes

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