Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2201b69d9726196…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 02:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df930a0a412504ba22aaa7960ca2f082 SHA-1: d7149387fe55da68d814024c4275190bbebbb11d SHA-256: e2201b69d97261966f53f0d6ec219432a34dfd00ed4ecc82d06a894858d7c3bc
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Mexico customs declaration form 2018'. This link, when clicked, leads to the URL https://ttraff.com/pify?keyword=mexico+customs+declaration+form+2018, which is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO poisoning or to obscure the malicious destination. The ML classifier strongly indicated maliciousness.

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=mexico+customs+declaration+form+2018
    • http://files.antiguoantiquesanddecorative.com/uploads/1/3/1/3/131382032/gomakatibimivo-zolofodaromitu-kavusabax.pdf
    • http://files.bowmanacademics.com/uploads/1/3/2/8/132814505/d7d78a6c43e89.pdf
    • http://files.liveatparkerhill.com/uploads/1/3/1/4/131453429/8633369.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/pukikuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2206/5557/files/13591305876.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/60025442643.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/basspro_sl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/microsoft_access_runtime_2010.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3029/files/chrome_remove_autocomplete_url.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/nejasefinexopojipapak.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/batavogezobimuvamutijiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/tixabu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea2.bin
bef72b5e2c020289d4dc0f51f724a6910b457eafcadadf9a5ccd232738f44168
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 5644 bytes
font_01_sfnt_off000071c0.bin
0824c2985a1ca01c3729203b9849ccf0e0cb48738433177fa7b8df7aacdaab97
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C0 10296 bytes
font_02_sfnt_off000094bd.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 4324 bytes